Journal
SMALL
Volume 18, Issue 18, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202107145
Keywords
electroluminescence; multifunctional diodes; perovskite nanocrystals; photovoltaics; reciprocity relation
Categories
Funding
- Central Organization Department
- South China University of Technology (SCUT)
- National Natural Science Foundation of China [U2001217]
- Guangdong Science and Technology Program [2020B121201003, 2019ZT08L075, 2019QN01L118, 2021A1515012545]
- Fundamental Research Fund for the Central Universities, SCUT [2020ZYGXZR095]
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By using solution engineered perovskite nanocrystals, efficient integration of electroluminescence and photovoltaic performance in a single device has been achieved, which shows great potential for various applications.
Integrating highly efficient photovoltaic (PV) function into light-emitting diodes (LEDs) for multifunctional display is of great significance for compact low-power electronics, but it remains challenging. Herein, it is demonstrated that solution engineered perovskite nanocrystals (PNCs, approximate to 100 nm) enable efficient electroluminescence (EL) and PV performance within a single device through tailoring the dispersity and interface. It delivers the maximum brightness of 490 W sr(-1) m(-2) at 2.7 V and 23.2% EL external quantum efficiency, a record value for near-infrared perovskite LED, as well as 15.23% PV efficiency, among the highest value for nanocrystal perovskite solar cells. The PV-EL performance is well in line with the reciprocity relation. These all-solution-processed PV-LED devices open up viable routes to a variety of advanced applications, from touchless interactive screens to energy harvesting displays and data communication.
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