Near-white emitting QD-LED based on hydrophilic CdS nanocrystals
In this work we report fabrication of a nanocrystal (NC)-based hybrid organic–inorganic LED with structure of ITO/PEDOT:PSS/PVK/CdS-NCs/(Al or Mg:Ag). The hydrophilic CdS NCs were synthesized using a novel aqueous thermochemical method at 80 °C and sizes (around 2 nm) were controlled by thioglycolic...
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| Veröffentlicht in: | Journal of luminescence 2012-02, Vol.132 (2), p.467-473 |
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| creator | Molaei, M. Marandi, M. Saievar-Iranizad, E. Taghavinia, N. Liu, B. Sun, H.D. Sun, X.W. |
| description | In this work we report fabrication of a nanocrystal (NC)-based hybrid organic–inorganic LED with structure of ITO/PEDOT:PSS/PVK/CdS-NCs/(Al or Mg:Ag). The hydrophilic CdS NCs were synthesized using a novel aqueous thermochemical method at 80
°C and sizes (around 2
nm) were controlled by thioglycolic acid (TGA) as the capping agent. The favorite feature of these NCs is their relatively high emission intensity and broad, near-white emission. The hydrophilic CdS NCs were successfully spin coated using Triton X-100 as the wetting agent. The fabricated LEDs demonstrated a turn on voltage about 7
V for Al metallic contact. The electroluminescence was a broad spectrum at 540 and 170
nm width, which was about 50
nm red shifted compared to photoluminescence spectra. The CIE color coordinates of the LED at (0.33, 0.43) demonstrated a near white light LED with an emission on green–yellow boundary of white. Annealing of the device up to 190
°C had a positive effect on the performance, possibly due to better contacts between layers. Replacing Al contacts with Mg:Ag reduced the turn-on voltage to 6
V and changed CIE color coordinate to (0.32, 0.41). The EL peak was also shifted to 525
nm, with a brightness of 15
Cd/m
2 at working voltage of 15
V. The current efficiency and external quantum efficiency of device were 0.08
Cd/A and 0.03% at current densities higher than 10
mA/cm
2.
► CdS NCs were synthesized using a novel thermochemical approach. ► Synthesized NCs were quite hydrophilic and considerably well dispersed in water. ► CdS NCs were used as emissive layer of ITO/PEDOT:PSS/PVK/CdS NCs/Al or Mg:Ag QD-LED. ► Fabricated device demonstrated a near white emission with (0.32, 0.41) CIE coordinates. ► Annealing of device was performed and proved effective in efficiency enhancement. |
| doi_str_mv | 10.1016/j.jlumin.2011.08.038 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_963859961</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0022231311004856</els_id><sourcerecordid>963859961</sourcerecordid><originalsourceid>FETCH-LOGICAL-c368t-3152bac6decf1f0cd9480fd7b0619cad6bb2b09dca7e8ebe3ca9e1af35e3a3943</originalsourceid><addsrcrecordid>eNp9kDtPwzAUhS0EEqXwDxiyIKaEazsPe0GgtjykCoSA2XLsG-ooTYqdgvrvSRXEyHSW89D5CDmnkFCg-VWd1M127dqEAaUJiAS4OCATKgoWF0LwQzIBYCxmnPJjchJCDQBcCjkhN0-offy9cj1GuHZ979qP6GUeLxfzqNQBbdS10WpnfbdZucaZaGZfo1a3nfG70OsmnJKjahA8-9Upeb9bvM0e4uXz_ePsdhkbnos-5jRjpTa5RVPRCoyVqYDKFiXkVBpt87JkJUhrdIECS-RGS6S64hlyzWXKp-Ry7N347nOLoVdrFww2jW6x2wYlcy4yKXM6ONPRaXwXgsdKbbxba79TFNSel6rVyEvteSkQauA1xC5-B3Qwuqm8bo0Lf1mWsSwFtq-_Hn04vP1y6FUwDluD1nk0vbKd-3_oB2pQg1A</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>963859961</pqid></control><display><type>article</type><title>Near-white emitting QD-LED based on hydrophilic CdS nanocrystals</title><source>Elsevier ScienceDirect Journals Complete</source><creator>Molaei, M. ; Marandi, M. ; Saievar-Iranizad, E. ; Taghavinia, N. ; Liu, B. ; Sun, H.D. ; Sun, X.W.</creator><creatorcontrib>Molaei, M. ; Marandi, M. ; Saievar-Iranizad, E. ; Taghavinia, N. ; Liu, B. ; Sun, H.D. ; Sun, X.W.</creatorcontrib><description>In this work we report fabrication of a nanocrystal (NC)-based hybrid organic–inorganic LED with structure of ITO/PEDOT:PSS/PVK/CdS-NCs/(Al or Mg:Ag). The hydrophilic CdS NCs were synthesized using a novel aqueous thermochemical method at 80
°C and sizes (around 2
nm) were controlled by thioglycolic acid (TGA) as the capping agent. The favorite feature of these NCs is their relatively high emission intensity and broad, near-white emission. The hydrophilic CdS NCs were successfully spin coated using Triton X-100 as the wetting agent. The fabricated LEDs demonstrated a turn on voltage about 7
V for Al metallic contact. The electroluminescence was a broad spectrum at 540 and 170
nm width, which was about 50
nm red shifted compared to photoluminescence spectra. The CIE color coordinates of the LED at (0.33, 0.43) demonstrated a near white light LED with an emission on green–yellow boundary of white. Annealing of the device up to 190
°C had a positive effect on the performance, possibly due to better contacts between layers. Replacing Al contacts with Mg:Ag reduced the turn-on voltage to 6
V and changed CIE color coordinate to (0.32, 0.41). The EL peak was also shifted to 525
nm, with a brightness of 15
Cd/m
2 at working voltage of 15
V. The current efficiency and external quantum efficiency of device were 0.08
Cd/A and 0.03% at current densities higher than 10
mA/cm
2.
► CdS NCs were synthesized using a novel thermochemical approach. ► Synthesized NCs were quite hydrophilic and considerably well dispersed in water. ► CdS NCs were used as emissive layer of ITO/PEDOT:PSS/PVK/CdS NCs/Al or Mg:Ag QD-LED. ► Fabricated device demonstrated a near white emission with (0.32, 0.41) CIE coordinates. ► Annealing of device was performed and proved effective in efficiency enhancement.</description><identifier>ISSN: 0022-2313</identifier><identifier>EISSN: 1872-7883</identifier><identifier>DOI: 10.1016/j.jlumin.2011.08.038</identifier><identifier>CODEN: JLUMA8</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Aluminum ; Applied sciences ; Aqueous synthesis ; Cadmium ; Cadmium sulfides ; CdS nanocrystals ; Contact ; Electric potential ; Electronics ; Emission ; Exact sciences and technology ; Hydrophilic ; Light-emitting diodes ; Optoelectronic devices ; QD-LED ; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices ; Voltage ; White emission</subject><ispartof>Journal of luminescence, 2012-02, Vol.132 (2), p.467-473</ispartof><rights>2011 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c368t-3152bac6decf1f0cd9480fd7b0619cad6bb2b09dca7e8ebe3ca9e1af35e3a3943</citedby><cites>FETCH-LOGICAL-c368t-3152bac6decf1f0cd9480fd7b0619cad6bb2b09dca7e8ebe3ca9e1af35e3a3943</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0022231311004856$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25254021$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Molaei, M.</creatorcontrib><creatorcontrib>Marandi, M.</creatorcontrib><creatorcontrib>Saievar-Iranizad, E.</creatorcontrib><creatorcontrib>Taghavinia, N.</creatorcontrib><creatorcontrib>Liu, B.</creatorcontrib><creatorcontrib>Sun, H.D.</creatorcontrib><creatorcontrib>Sun, X.W.</creatorcontrib><title>Near-white emitting QD-LED based on hydrophilic CdS nanocrystals</title><title>Journal of luminescence</title><description>In this work we report fabrication of a nanocrystal (NC)-based hybrid organic–inorganic LED with structure of ITO/PEDOT:PSS/PVK/CdS-NCs/(Al or Mg:Ag). The hydrophilic CdS NCs were synthesized using a novel aqueous thermochemical method at 80
°C and sizes (around 2
nm) were controlled by thioglycolic acid (TGA) as the capping agent. The favorite feature of these NCs is their relatively high emission intensity and broad, near-white emission. The hydrophilic CdS NCs were successfully spin coated using Triton X-100 as the wetting agent. The fabricated LEDs demonstrated a turn on voltage about 7
V for Al metallic contact. The electroluminescence was a broad spectrum at 540 and 170
nm width, which was about 50
nm red shifted compared to photoluminescence spectra. The CIE color coordinates of the LED at (0.33, 0.43) demonstrated a near white light LED with an emission on green–yellow boundary of white. Annealing of the device up to 190
°C had a positive effect on the performance, possibly due to better contacts between layers. Replacing Al contacts with Mg:Ag reduced the turn-on voltage to 6
V and changed CIE color coordinate to (0.32, 0.41). The EL peak was also shifted to 525
nm, with a brightness of 15
Cd/m
2 at working voltage of 15
V. The current efficiency and external quantum efficiency of device were 0.08
Cd/A and 0.03% at current densities higher than 10
mA/cm
2.
► CdS NCs were synthesized using a novel thermochemical approach. ► Synthesized NCs were quite hydrophilic and considerably well dispersed in water. ► CdS NCs were used as emissive layer of ITO/PEDOT:PSS/PVK/CdS NCs/Al or Mg:Ag QD-LED. ► Fabricated device demonstrated a near white emission with (0.32, 0.41) CIE coordinates. ► Annealing of device was performed and proved effective in efficiency enhancement.</description><subject>Aluminum</subject><subject>Applied sciences</subject><subject>Aqueous synthesis</subject><subject>Cadmium</subject><subject>Cadmium sulfides</subject><subject>CdS nanocrystals</subject><subject>Contact</subject><subject>Electric potential</subject><subject>Electronics</subject><subject>Emission</subject><subject>Exact sciences and technology</subject><subject>Hydrophilic</subject><subject>Light-emitting diodes</subject><subject>Optoelectronic devices</subject><subject>QD-LED</subject><subject>Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices</subject><subject>Voltage</subject><subject>White emission</subject><issn>0022-2313</issn><issn>1872-7883</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp9kDtPwzAUhS0EEqXwDxiyIKaEazsPe0GgtjykCoSA2XLsG-ooTYqdgvrvSRXEyHSW89D5CDmnkFCg-VWd1M127dqEAaUJiAS4OCATKgoWF0LwQzIBYCxmnPJjchJCDQBcCjkhN0-offy9cj1GuHZ979qP6GUeLxfzqNQBbdS10WpnfbdZucaZaGZfo1a3nfG70OsmnJKjahA8-9Upeb9bvM0e4uXz_ePsdhkbnos-5jRjpTa5RVPRCoyVqYDKFiXkVBpt87JkJUhrdIECS-RGS6S64hlyzWXKp-Ry7N347nOLoVdrFww2jW6x2wYlcy4yKXM6ONPRaXwXgsdKbbxba79TFNSel6rVyEvteSkQauA1xC5-B3Qwuqm8bo0Lf1mWsSwFtq-_Hn04vP1y6FUwDluD1nk0vbKd-3_oB2pQg1A</recordid><startdate>20120201</startdate><enddate>20120201</enddate><creator>Molaei, M.</creator><creator>Marandi, M.</creator><creator>Saievar-Iranizad, E.</creator><creator>Taghavinia, N.</creator><creator>Liu, B.</creator><creator>Sun, H.D.</creator><creator>Sun, X.W.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20120201</creationdate><title>Near-white emitting QD-LED based on hydrophilic CdS nanocrystals</title><author>Molaei, M. ; Marandi, M. ; Saievar-Iranizad, E. ; Taghavinia, N. ; Liu, B. ; Sun, H.D. ; Sun, X.W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c368t-3152bac6decf1f0cd9480fd7b0619cad6bb2b09dca7e8ebe3ca9e1af35e3a3943</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Aluminum</topic><topic>Applied sciences</topic><topic>Aqueous synthesis</topic><topic>Cadmium</topic><topic>Cadmium sulfides</topic><topic>CdS nanocrystals</topic><topic>Contact</topic><topic>Electric potential</topic><topic>Electronics</topic><topic>Emission</topic><topic>Exact sciences and technology</topic><topic>Hydrophilic</topic><topic>Light-emitting diodes</topic><topic>Optoelectronic devices</topic><topic>QD-LED</topic><topic>Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices</topic><topic>Voltage</topic><topic>White emission</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Molaei, M.</creatorcontrib><creatorcontrib>Marandi, M.</creatorcontrib><creatorcontrib>Saievar-Iranizad, E.</creatorcontrib><creatorcontrib>Taghavinia, N.</creatorcontrib><creatorcontrib>Liu, B.</creatorcontrib><creatorcontrib>Sun, H.D.</creatorcontrib><creatorcontrib>Sun, X.W.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of luminescence</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Molaei, M.</au><au>Marandi, M.</au><au>Saievar-Iranizad, E.</au><au>Taghavinia, N.</au><au>Liu, B.</au><au>Sun, H.D.</au><au>Sun, X.W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Near-white emitting QD-LED based on hydrophilic CdS nanocrystals</atitle><jtitle>Journal of luminescence</jtitle><date>2012-02-01</date><risdate>2012</risdate><volume>132</volume><issue>2</issue><spage>467</spage><epage>473</epage><pages>467-473</pages><issn>0022-2313</issn><eissn>1872-7883</eissn><coden>JLUMA8</coden><abstract>In this work we report fabrication of a nanocrystal (NC)-based hybrid organic–inorganic LED with structure of ITO/PEDOT:PSS/PVK/CdS-NCs/(Al or Mg:Ag). The hydrophilic CdS NCs were synthesized using a novel aqueous thermochemical method at 80
°C and sizes (around 2
nm) were controlled by thioglycolic acid (TGA) as the capping agent. The favorite feature of these NCs is their relatively high emission intensity and broad, near-white emission. The hydrophilic CdS NCs were successfully spin coated using Triton X-100 as the wetting agent. The fabricated LEDs demonstrated a turn on voltage about 7
V for Al metallic contact. The electroluminescence was a broad spectrum at 540 and 170
nm width, which was about 50
nm red shifted compared to photoluminescence spectra. The CIE color coordinates of the LED at (0.33, 0.43) demonstrated a near white light LED with an emission on green–yellow boundary of white. Annealing of the device up to 190
°C had a positive effect on the performance, possibly due to better contacts between layers. Replacing Al contacts with Mg:Ag reduced the turn-on voltage to 6
V and changed CIE color coordinate to (0.32, 0.41). The EL peak was also shifted to 525
nm, with a brightness of 15
Cd/m
2 at working voltage of 15
V. The current efficiency and external quantum efficiency of device were 0.08
Cd/A and 0.03% at current densities higher than 10
mA/cm
2.
► CdS NCs were synthesized using a novel thermochemical approach. ► Synthesized NCs were quite hydrophilic and considerably well dispersed in water. ► CdS NCs were used as emissive layer of ITO/PEDOT:PSS/PVK/CdS NCs/Al or Mg:Ag QD-LED. ► Fabricated device demonstrated a near white emission with (0.32, 0.41) CIE coordinates. ► Annealing of device was performed and proved effective in efficiency enhancement.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jlumin.2011.08.038</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of luminescence, 2012-02, Vol.132 (2), p.467-473 |
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| subjects | Aluminum Applied sciences Aqueous synthesis Cadmium Cadmium sulfides CdS nanocrystals Contact Electric potential Electronics Emission Exact sciences and technology Hydrophilic Light-emitting diodes Optoelectronic devices QD-LED Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Voltage White emission |
| title | Near-white emitting QD-LED based on hydrophilic CdS nanocrystals |
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