Performance of white light emitting diodes prepared by casting wavelength‐converting polymer on InGaN devices
ABSTRACT UV‐curable siloxane oligomers prepared by a hydrosilylation reaction were used as encapsulant. Two fluorescent copolymers with emission covering the range of green and red light were synthesized and blended with the UV‐curable siloxane oligomers and photoinitiator to make the wavelength‐con...
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| Veröffentlicht in: | Journal of applied polymer science 2017-09, Vol.134 (34), p.n/a |
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| container_title | Journal of applied polymer science |
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| creator | Chang, Chi‐Jung Leong, Yun‐Yi Lai, Chun‐Feng Chiou, Wei‐Yung Su, Min‐Ju Chang, Shinn‐Jen |
| description | ABSTRACT
UV‐curable siloxane oligomers prepared by a hydrosilylation reaction were used as encapsulant. Two fluorescent copolymers with emission covering the range of green and red light were synthesized and blended with the UV‐curable siloxane oligomers and photoinitiator to make the wavelength‐converting polymer (WCP). WCP was casted on blue light emitting InGaN diodes and UV cured to fabricate white light emitting diodes (WLEDs). Effects of monomer compositions on the fluidity of uncured oligomer, together with the optical, thermal, and mechanical properties of the cured polysiloxane were studied. We also investigated the influence of red fluorescent polymer which was comprised of repeating units of dioctylfluorene, bisthienyl‐benzothiadiazole, and benzothiadiazole segments on the color rendering index, correlated color temperature, and luminous efficacy of WLED. Because of the good match between the absorption and emission features of the segments in the fluorescent copolymers, white LEDs can be produced by fluorescent copolymer blends which can support incomplete energy transfer. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45210. |
| doi_str_mv | 10.1002/app.45210 |
| format | Article |
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UV‐curable siloxane oligomers prepared by a hydrosilylation reaction were used as encapsulant. Two fluorescent copolymers with emission covering the range of green and red light were synthesized and blended with the UV‐curable siloxane oligomers and photoinitiator to make the wavelength‐converting polymer (WCP). WCP was casted on blue light emitting InGaN diodes and UV cured to fabricate white light emitting diodes (WLEDs). Effects of monomer compositions on the fluidity of uncured oligomer, together with the optical, thermal, and mechanical properties of the cured polysiloxane were studied. We also investigated the influence of red fluorescent polymer which was comprised of repeating units of dioctylfluorene, bisthienyl‐benzothiadiazole, and benzothiadiazole segments on the color rendering index, correlated color temperature, and luminous efficacy of WLED. Because of the good match between the absorption and emission features of the segments in the fluorescent copolymers, white LEDs can be produced by fluorescent copolymer blends which can support incomplete energy transfer. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45210.</description><identifier>ISSN: 0021-8995</identifier><identifier>EISSN: 1097-4628</identifier><identifier>DOI: 10.1002/app.45210</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc</publisher><subject>Absorption ; Color temperature ; Composition effects ; Conversion ; Copolymers ; Correlation ; Devices ; Effectiveness ; Emission ; encapsulant ; Encapsulation ; Energy transfer ; Fluorescence ; fluorescent polymer ; Hydrosilylation ; Indium gallium nitrides ; light emitting diode ; Light emitting diodes ; Materials science ; Mechanical properties ; Oligomers ; Optical properties ; Polymers ; Segments ; Ultraviolet radiation ; UV‐curable ; Viscosity ; wavelength‐converting</subject><ispartof>Journal of applied polymer science, 2017-09, Vol.134 (34), p.n/a</ispartof><rights>2017 Wiley Periodicals, Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fapp.45210$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fapp.45210$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Chang, Chi‐Jung</creatorcontrib><creatorcontrib>Leong, Yun‐Yi</creatorcontrib><creatorcontrib>Lai, Chun‐Feng</creatorcontrib><creatorcontrib>Chiou, Wei‐Yung</creatorcontrib><creatorcontrib>Su, Min‐Ju</creatorcontrib><creatorcontrib>Chang, Shinn‐Jen</creatorcontrib><title>Performance of white light emitting diodes prepared by casting wavelength‐converting polymer on InGaN devices</title><title>Journal of applied polymer science</title><description>ABSTRACT
UV‐curable siloxane oligomers prepared by a hydrosilylation reaction were used as encapsulant. Two fluorescent copolymers with emission covering the range of green and red light were synthesized and blended with the UV‐curable siloxane oligomers and photoinitiator to make the wavelength‐converting polymer (WCP). WCP was casted on blue light emitting InGaN diodes and UV cured to fabricate white light emitting diodes (WLEDs). Effects of monomer compositions on the fluidity of uncured oligomer, together with the optical, thermal, and mechanical properties of the cured polysiloxane were studied. We also investigated the influence of red fluorescent polymer which was comprised of repeating units of dioctylfluorene, bisthienyl‐benzothiadiazole, and benzothiadiazole segments on the color rendering index, correlated color temperature, and luminous efficacy of WLED. Because of the good match between the absorption and emission features of the segments in the fluorescent copolymers, white LEDs can be produced by fluorescent copolymer blends which can support incomplete energy transfer. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45210.</description><subject>Absorption</subject><subject>Color temperature</subject><subject>Composition effects</subject><subject>Conversion</subject><subject>Copolymers</subject><subject>Correlation</subject><subject>Devices</subject><subject>Effectiveness</subject><subject>Emission</subject><subject>encapsulant</subject><subject>Encapsulation</subject><subject>Energy transfer</subject><subject>Fluorescence</subject><subject>fluorescent polymer</subject><subject>Hydrosilylation</subject><subject>Indium gallium nitrides</subject><subject>light emitting diode</subject><subject>Light emitting diodes</subject><subject>Materials science</subject><subject>Mechanical properties</subject><subject>Oligomers</subject><subject>Optical properties</subject><subject>Polymers</subject><subject>Segments</subject><subject>Ultraviolet radiation</subject><subject>UV‐curable</subject><subject>Viscosity</subject><subject>wavelength‐converting</subject><issn>0021-8995</issn><issn>1097-4628</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNotkE1OwzAQhS0EEqWw4AaWWKf1T-LEy6rip1IFXcDacu1J6yqJjZO2yo4jcEZOQmhZzWje08ybD6F7SiaUEDbVIUzSjFFygUaUyDxJBSsu0WjQaFJImV2jm7bdEUJpRsQI-RXE0sdaNwawL_Fx6zrAldtsOwy16zrXbLB13kKLQ4SgI1i87rHR7Uk66gNU0Gy67c_Xt_HNAeJpHnzV1xCxb_Ciedav2MLBGWhv0VWpqxbu_usYfTw9vs9fkuXb82I-WyaBMU4SIIYVIAzNh8xawvARFAaEZZzxUlhuc50zkgoixVozzXmmCSulLERpc2v4GD2c94boP_fQdmrn97EZTioqSZpnTIhscE3PrqOroFchulrHXlGi_mCqAaY6wVSz1erU8F9TI2uL</recordid><startdate>20170910</startdate><enddate>20170910</enddate><creator>Chang, Chi‐Jung</creator><creator>Leong, Yun‐Yi</creator><creator>Lai, Chun‐Feng</creator><creator>Chiou, Wei‐Yung</creator><creator>Su, Min‐Ju</creator><creator>Chang, Shinn‐Jen</creator><general>Wiley Subscription Services, Inc</general><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20170910</creationdate><title>Performance of white light emitting diodes prepared by casting wavelength‐converting polymer on InGaN devices</title><author>Chang, Chi‐Jung ; Leong, Yun‐Yi ; Lai, Chun‐Feng ; Chiou, Wei‐Yung ; Su, Min‐Ju ; Chang, Shinn‐Jen</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p2230-e0c28e6c17899a9e521e8ce6d2323f6d3d7a72046096ba2a335a02f9986fd7dc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Absorption</topic><topic>Color temperature</topic><topic>Composition effects</topic><topic>Conversion</topic><topic>Copolymers</topic><topic>Correlation</topic><topic>Devices</topic><topic>Effectiveness</topic><topic>Emission</topic><topic>encapsulant</topic><topic>Encapsulation</topic><topic>Energy transfer</topic><topic>Fluorescence</topic><topic>fluorescent polymer</topic><topic>Hydrosilylation</topic><topic>Indium gallium nitrides</topic><topic>light emitting diode</topic><topic>Light emitting diodes</topic><topic>Materials science</topic><topic>Mechanical properties</topic><topic>Oligomers</topic><topic>Optical properties</topic><topic>Polymers</topic><topic>Segments</topic><topic>Ultraviolet radiation</topic><topic>UV‐curable</topic><topic>Viscosity</topic><topic>wavelength‐converting</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chang, Chi‐Jung</creatorcontrib><creatorcontrib>Leong, Yun‐Yi</creatorcontrib><creatorcontrib>Lai, Chun‐Feng</creatorcontrib><creatorcontrib>Chiou, Wei‐Yung</creatorcontrib><creatorcontrib>Su, Min‐Ju</creatorcontrib><creatorcontrib>Chang, Shinn‐Jen</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of applied polymer science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chang, Chi‐Jung</au><au>Leong, Yun‐Yi</au><au>Lai, Chun‐Feng</au><au>Chiou, Wei‐Yung</au><au>Su, Min‐Ju</au><au>Chang, Shinn‐Jen</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Performance of white light emitting diodes prepared by casting wavelength‐converting polymer on InGaN devices</atitle><jtitle>Journal of applied polymer science</jtitle><date>2017-09-10</date><risdate>2017</risdate><volume>134</volume><issue>34</issue><epage>n/a</epage><issn>0021-8995</issn><eissn>1097-4628</eissn><abstract>ABSTRACT
UV‐curable siloxane oligomers prepared by a hydrosilylation reaction were used as encapsulant. Two fluorescent copolymers with emission covering the range of green and red light were synthesized and blended with the UV‐curable siloxane oligomers and photoinitiator to make the wavelength‐converting polymer (WCP). WCP was casted on blue light emitting InGaN diodes and UV cured to fabricate white light emitting diodes (WLEDs). Effects of monomer compositions on the fluidity of uncured oligomer, together with the optical, thermal, and mechanical properties of the cured polysiloxane were studied. We also investigated the influence of red fluorescent polymer which was comprised of repeating units of dioctylfluorene, bisthienyl‐benzothiadiazole, and benzothiadiazole segments on the color rendering index, correlated color temperature, and luminous efficacy of WLED. Because of the good match between the absorption and emission features of the segments in the fluorescent copolymers, white LEDs can be produced by fluorescent copolymer blends which can support incomplete energy transfer. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45210.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/app.45210</doi><tpages>8</tpages></addata></record> |
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| subjects | Absorption Color temperature Composition effects Conversion Copolymers Correlation Devices Effectiveness Emission encapsulant Encapsulation Energy transfer Fluorescence fluorescent polymer Hydrosilylation Indium gallium nitrides light emitting diode Light emitting diodes Materials science Mechanical properties Oligomers Optical properties Polymers Segments Ultraviolet radiation UV‐curable Viscosity wavelength‐converting |
| title | Performance of white light emitting diodes prepared by casting wavelength‐converting polymer on InGaN devices |
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