Energy Down-Conversion Cs3Cu2Cl5 Nanocrystals for Boosting the Efficiency of UV Photodetector

Frontiers in Materials

Javed Akram¹  Suhaidi Bin Shafie²  Jing Chen³  Lixi Wang³  Wei Lei³  Fan Fang³  Qing Li³  Zihan Zhao³  Zhuoya Zhu³  Xiaobing Zhang³  Zhiwei Zhao³  Jun Wu³  Chengjun Liu³  Razika Zair Talaighil⁴  Jiangyong Pan⁵ 

[1] COMSATS University Islamabad, Islamabad, Pakistan;Institute of Advanced Technology, Universiti Putra Malaysia, Serdang, Malaysia;Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China;Research Unit of Materials Processes and Environment (URMPE), University M’hamed Bougara of Boumerdes, Boumerdes, Algeria;School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China;State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, China Nuclear Power Engineering Co., Ltd., Shenzhen, China;

关键词: lead-free perovskite;    all-inorganic perovskite nanocrystals;    photoluminescence quantum yield;    ligand-assisted;    stability;   

DOI  :  10.3389/fmats.2021.682833

来源: DOAJ

【 摘 要 】

Zero-dimension (0-D) lead halide perovskite nanocrystals (NCs) have attracted a sight of interest in the field of optoelectronic devices due to their outstanding properties, such as high photoluminescence quantum yield (PLQY) and size- and composition-controlled tunable emission wavelengths. However, the toxicity of lead (Pb) element in the lead perovskite NCs is the bottleneck for the commercial application of perovskite NCs. Herein, we report a facile ligand-assisted synthesis to achieve lead-free Cs3Cu2Cl5 NCs with a high PLQY of ∼70% and good stability against environmental oxygen/moisture as a promising down-conversion material. It has good merits of high PLQY and large Stokes shift (∼300 nm) originated from the effect of Jahn–Teller distortion and self-trapped excitons (STEs). Furthermore, the Cs3Cu2Cl5 NCs embedded composite films (NCCFs) were utilized to enhance the ultraviolet (UV) response of silicon (Si) photodetectors. External quantum efficiency (EQE) measurements show that the UV response can be greatly improved from 3.3 to 19.9% @ 295 nm based on NCCFs combined with Si photodiodes. Our work offers an effective approach to develop highly efficient and stable lead-free Cs3Cu2Cl5 NCs for the application in the solar-blind UV photodetector.

【 授权许可】

Unknown