White light-emitting devices based on ZnCdS/ZnS and perovskite nanocrystal heterojunction

Perovskite white light-emitting devices (WLEDs) without intercalation layers have not been achieved due to the ion exchange. Although the intercalation layers prevent ion exchange between perovskite nanocrystals (NCs), it also creates a new problem of charge imbalance and the structure becomes more...

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Veröffentlicht in:	Nanotechnology 2019-11, Vol.30 (46), p.465201-465201
Hauptverfasser:	Wang, Congcong, Xue, Dingke, Shen, Xinyu, Wu, Hua, Zhang, Yu, Cui, Haining, Yu, William W
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Sprache:	eng
Schlagworte:	heterojunction LED nanocrystal perovskite white light
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container_issue	46
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container_title	Nanotechnology
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creator	Wang, Congcong Xue, Dingke Shen, Xinyu Wu, Hua Zhang, Yu Cui, Haining Yu, William W
description	Perovskite white light-emitting devices (WLEDs) without intercalation layers have not been achieved due to the ion exchange. Although the intercalation layers prevent ion exchange between perovskite nanocrystals (NCs), it also creates a new problem of charge imbalance and the structure becomes more complex. In this study, blue emitting ZnCdS/ZnS NCs with high quantum yield and stability are introduced to work with the yellow emission from CsPb(Br/I)3 perovskite NCs for WLEDs. The WLEDs are constituted of ITO/ZnO/PEI/ZnCdS/ZnS NCs/CsPb(Br/I)3 NCs/TCTA/MoO3/Au. This design avoids ion exchange between different perovskites NCs, and realizes white light emission by simple fabrication. As a result, we achieved the white light coordinates of (0.34, 0.34) and a correlated color temperature of 5153 K.
doi_str_mv	10.1088/1361-6528/ab39b2
format	Article
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title	White light-emitting devices based on ZnCdS/ZnS and perovskite nanocrystal heterojunction
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