Composition‐Dependent Hot Carrier Relaxation Dynamics in Cesium Lead Halide (CsPbX3, X=Br and I) Perovskite Nanocrystals
Cesium‐based perovskite nanocrystals (NCs) have outstanding photophysical properties improving the performances of lighting devices. Fundamental studies on excitonic properties and hot‐carrier dynamics in perovskite NCs further suggest that these materials show higher efficiencies compared to the bu...
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| Veröffentlicht in: | Angewandte Chemie 2017-04, Vol.129 (15), p.4224-4228 |
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| creator | Chung, Heejae Jung, Seok Il Kim, Hyo Jin Cha, Wonhee Sim, Eunji Kim, Dongho Koh, Weon‐Kyu Kim, Jiwon |
| description | Cesium‐based perovskite nanocrystals (NCs) have outstanding photophysical properties improving the performances of lighting devices. Fundamental studies on excitonic properties and hot‐carrier dynamics in perovskite NCs further suggest that these materials show higher efficiencies compared to the bulk form of perovskites. However, the relaxation rates and pathways of hot‐carriers are still being elucidated. By using ultrafast transient spectroscopy and calculating electronic band structures, we investigated the dependence of halide in Cs‐based perovskite (CsPbX3 with X=Br, I, or their mixtures) NCs on the hot‐carrier relaxation processes. All samples exhibit ultrafast (CsPbBr1.5I1.5 (380 fs)>CsPbI3 NC (580 fs). These result accounts for a reduced light emission efficiency of CsPbI3 NC compared to CsPbBr3 NC.
Heiße Träger: Die signifikante Abhängigkeit der Relaxationsrate heißer Träger vom Halogen (X=Br, I oder Mischung) wird hauptsächlich der Zustandsdichte der Löcher im Valenzband von CsPbX3‐Nanokristallen zugeordnet. Die Relaxationsrate verringert sich beim Übergang von CsPbBr3‐ zu CsPbI3‐Nanokristallen. VB=Valenzband, CB=Leitungsband. |
| doi_str_mv | 10.1002/ange.201611916 |
| format | Article |
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Heiße Träger: Die signifikante Abhängigkeit der Relaxationsrate heißer Träger vom Halogen (X=Br, I oder Mischung) wird hauptsächlich der Zustandsdichte der Löcher im Valenzband von CsPbX3‐Nanokristallen zugeordnet. Die Relaxationsrate verringert sich beim Übergang von CsPbBr3‐ zu CsPbI3‐Nanokristallen. VB=Valenzband, CB=Leitungsband.</description><identifier>ISSN: 0044-8249</identifier><identifier>EISSN: 1521-3757</identifier><identifier>DOI: 10.1002/ange.201611916</identifier><language>eng ; ger</language><publisher>Weinheim: Wiley Subscription Services, Inc</publisher><subject>Cesium ; Chemistry ; Crystals ; Elektronendichten ; Emissions control ; Heiße Träger ; Intrabandrelaxation ; Lead compounds ; Light emission ; Metal halides ; Multiphononenemission ; Nanocrystals ; Perovskites ; Perowskite ; Spectroscopy</subject><ispartof>Angewandte Chemie, 2017-04, Vol.129 (15), p.4224-4228</ispartof><rights>2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim</rights><rights>2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2566-6adcbff36e8afbabcc00b941167d211dcdd84e46ba0f1159abd1da10cac370573</citedby><cites>FETCH-LOGICAL-c2566-6adcbff36e8afbabcc00b941167d211dcdd84e46ba0f1159abd1da10cac370573</cites><orcidid>0000-0001-8668-2644 ; 0000-0001-5436-3753 ; 0000-0002-6913-4184 ; 0000-0002-7641-5718 ; 0000-0002-1458-4743</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fange.201611916$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fange.201611916$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Chung, Heejae</creatorcontrib><creatorcontrib>Jung, Seok Il</creatorcontrib><creatorcontrib>Kim, Hyo Jin</creatorcontrib><creatorcontrib>Cha, Wonhee</creatorcontrib><creatorcontrib>Sim, Eunji</creatorcontrib><creatorcontrib>Kim, Dongho</creatorcontrib><creatorcontrib>Koh, Weon‐Kyu</creatorcontrib><creatorcontrib>Kim, Jiwon</creatorcontrib><title>Composition‐Dependent Hot Carrier Relaxation Dynamics in Cesium Lead Halide (CsPbX3, X=Br and I) Perovskite Nanocrystals</title><title>Angewandte Chemie</title><description>Cesium‐based perovskite nanocrystals (NCs) have outstanding photophysical properties improving the performances of lighting devices. Fundamental studies on excitonic properties and hot‐carrier dynamics in perovskite NCs further suggest that these materials show higher efficiencies compared to the bulk form of perovskites. However, the relaxation rates and pathways of hot‐carriers are still being elucidated. By using ultrafast transient spectroscopy and calculating electronic band structures, we investigated the dependence of halide in Cs‐based perovskite (CsPbX3 with X=Br, I, or their mixtures) NCs on the hot‐carrier relaxation processes. All samples exhibit ultrafast (<0.6 ps) hot‐carrier relaxation dynamics with following order: CsPbBr3 (310 fs)>CsPbBr1.5I1.5 (380 fs)>CsPbI3 NC (580 fs). These result accounts for a reduced light emission efficiency of CsPbI3 NC compared to CsPbBr3 NC.
Heiße Träger: Die signifikante Abhängigkeit der Relaxationsrate heißer Träger vom Halogen (X=Br, I oder Mischung) wird hauptsächlich der Zustandsdichte der Löcher im Valenzband von CsPbX3‐Nanokristallen zugeordnet. Die Relaxationsrate verringert sich beim Übergang von CsPbBr3‐ zu CsPbI3‐Nanokristallen. VB=Valenzband, CB=Leitungsband.</description><subject>Cesium</subject><subject>Chemistry</subject><subject>Crystals</subject><subject>Elektronendichten</subject><subject>Emissions control</subject><subject>Heiße Träger</subject><subject>Intrabandrelaxation</subject><subject>Lead compounds</subject><subject>Light emission</subject><subject>Metal halides</subject><subject>Multiphononenemission</subject><subject>Nanocrystals</subject><subject>Perovskites</subject><subject>Perowskite</subject><subject>Spectroscopy</subject><issn>0044-8249</issn><issn>1521-3757</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqFkcFu00AQhlcIJELhynklLiDhdMZer-0Dh-KWplLUVqiVerPGu2O0JdkNuw4QTjwCz8iTNFGqcqOn__J9M4dPiNcIUwTID8l_4WkOqBEb1E_EBMscs6Iqq6diAqBUVueqeS5epHQLADqvmon41YblKiQ3uuD__v5zzCv2lv0oZ2GULcXoOMrPvKCftEPk8cbT0pkknZctJ7deyjmTlTNaOMvybZsu-5vivbz58DFK8laevZOXHMP39NWNLM_JBxM3aaRFeimeDdvhV_d7IK4_nVy1s2x-cXrWHs0zk5daZ5qs6Yeh0FzT0FNvDEDfKERd2RzRGmtrxUr3BANi2VBv0RKCIVNUUFbFgXizv7uK4dua09jdhnX025cdNqAgLxtV_peqa1RQVYhbarqnTAwpRR66VXRLipsOodtV6HYVuocKW6HZCz_cgjeP0N3R-enJP_cOgC-Mfg</recordid><startdate>20170403</startdate><enddate>20170403</enddate><creator>Chung, Heejae</creator><creator>Jung, Seok Il</creator><creator>Kim, Hyo Jin</creator><creator>Cha, Wonhee</creator><creator>Sim, Eunji</creator><creator>Kim, Dongho</creator><creator>Koh, Weon‐Kyu</creator><creator>Kim, Jiwon</creator><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-8668-2644</orcidid><orcidid>https://orcid.org/0000-0001-5436-3753</orcidid><orcidid>https://orcid.org/0000-0002-6913-4184</orcidid><orcidid>https://orcid.org/0000-0002-7641-5718</orcidid><orcidid>https://orcid.org/0000-0002-1458-4743</orcidid></search><sort><creationdate>20170403</creationdate><title>Composition‐Dependent Hot Carrier Relaxation Dynamics in Cesium Lead Halide (CsPbX3, X=Br and I) Perovskite Nanocrystals</title><author>Chung, Heejae ; Jung, Seok Il ; Kim, Hyo Jin ; Cha, Wonhee ; Sim, Eunji ; Kim, Dongho ; Koh, Weon‐Kyu ; Kim, Jiwon</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2566-6adcbff36e8afbabcc00b941167d211dcdd84e46ba0f1159abd1da10cac370573</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng ; ger</language><creationdate>2017</creationdate><topic>Cesium</topic><topic>Chemistry</topic><topic>Crystals</topic><topic>Elektronendichten</topic><topic>Emissions control</topic><topic>Heiße Träger</topic><topic>Intrabandrelaxation</topic><topic>Lead compounds</topic><topic>Light emission</topic><topic>Metal halides</topic><topic>Multiphononenemission</topic><topic>Nanocrystals</topic><topic>Perovskites</topic><topic>Perowskite</topic><topic>Spectroscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chung, Heejae</creatorcontrib><creatorcontrib>Jung, Seok Il</creatorcontrib><creatorcontrib>Kim, Hyo Jin</creatorcontrib><creatorcontrib>Cha, Wonhee</creatorcontrib><creatorcontrib>Sim, Eunji</creatorcontrib><creatorcontrib>Kim, Dongho</creatorcontrib><creatorcontrib>Koh, Weon‐Kyu</creatorcontrib><creatorcontrib>Kim, Jiwon</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Angewandte Chemie</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chung, Heejae</au><au>Jung, Seok Il</au><au>Kim, Hyo Jin</au><au>Cha, Wonhee</au><au>Sim, Eunji</au><au>Kim, Dongho</au><au>Koh, Weon‐Kyu</au><au>Kim, Jiwon</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Composition‐Dependent Hot Carrier Relaxation Dynamics in Cesium Lead Halide (CsPbX3, X=Br and I) Perovskite Nanocrystals</atitle><jtitle>Angewandte Chemie</jtitle><date>2017-04-03</date><risdate>2017</risdate><volume>129</volume><issue>15</issue><spage>4224</spage><epage>4228</epage><pages>4224-4228</pages><issn>0044-8249</issn><eissn>1521-3757</eissn><abstract>Cesium‐based perovskite nanocrystals (NCs) have outstanding photophysical properties improving the performances of lighting devices. Fundamental studies on excitonic properties and hot‐carrier dynamics in perovskite NCs further suggest that these materials show higher efficiencies compared to the bulk form of perovskites. However, the relaxation rates and pathways of hot‐carriers are still being elucidated. By using ultrafast transient spectroscopy and calculating electronic band structures, we investigated the dependence of halide in Cs‐based perovskite (CsPbX3 with X=Br, I, or their mixtures) NCs on the hot‐carrier relaxation processes. All samples exhibit ultrafast (<0.6 ps) hot‐carrier relaxation dynamics with following order: CsPbBr3 (310 fs)>CsPbBr1.5I1.5 (380 fs)>CsPbI3 NC (580 fs). These result accounts for a reduced light emission efficiency of CsPbI3 NC compared to CsPbBr3 NC.
Heiße Träger: Die signifikante Abhängigkeit der Relaxationsrate heißer Träger vom Halogen (X=Br, I oder Mischung) wird hauptsächlich der Zustandsdichte der Löcher im Valenzband von CsPbX3‐Nanokristallen zugeordnet. Die Relaxationsrate verringert sich beim Übergang von CsPbBr3‐ zu CsPbI3‐Nanokristallen. VB=Valenzband, CB=Leitungsband.</abstract><cop>Weinheim</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/ange.201611916</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0001-8668-2644</orcidid><orcidid>https://orcid.org/0000-0001-5436-3753</orcidid><orcidid>https://orcid.org/0000-0002-6913-4184</orcidid><orcidid>https://orcid.org/0000-0002-7641-5718</orcidid><orcidid>https://orcid.org/0000-0002-1458-4743</orcidid></addata></record> |
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| subjects | Cesium Chemistry Crystals Elektronendichten Emissions control Heiße Träger Intrabandrelaxation Lead compounds Light emission Metal halides Multiphononenemission Nanocrystals Perovskites Perowskite Spectroscopy |
| title | Composition‐Dependent Hot Carrier Relaxation Dynamics in Cesium Lead Halide (CsPbX3, X=Br and I) Perovskite Nanocrystals |
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