Highly Transparent, Dual-Color Emission, Heterophase Cs3Cu2I5/CsCu2I3 Nanolayer for Transparent Luminescent Solar Concentrators

Yunzhi Gu; Xiang Yao; Huaxiu Geng; Guijian Guan; Minglie Hu; Mingyong Han

doi:10.1021/acsami.1c07686

Highly Transparent, Dual-Color Emission, Heterophase Cs₃Cu₂I₅/CsCu₂I₃ Nanolayer for Transparent Luminescent Solar Concentrators

ACS Appl Mater Interfaces. 2021 Sep 1;13(34):40798-40805. doi: 10.1021/acsami.1c07686. Epub 2021 Aug 17.

Authors

Yunzhi Gu¹, Xiang Yao², Huaxiu Geng², Guijian Guan², Minglie Hu¹, Mingyong Han²

Affiliations

¹ Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, College of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, P. R. China.
² Institute of Molecular Plus, Tianjin University, Tianjin 300072, P. R. China.

PMID: 34470110
DOI: 10.1021/acsami.1c07686

Abstract

Transparent luminescent solar concentrators (TLSCs) have been attracting wide attentions for their applications in transparent photovoltaic (PV) windows, smart greenhouses, and mobile electronics on account of the simple architecture and low-cost preparation. We report a novel strategy to fabricate TLSCs using the heterophase lead-free perovskites. The heterophase nanolayered films which combined CsCu₂I₃ and Cs₃Cu₂I₅ were prepared in one step using a dual-source coevaporation technique. The CsCu₂I₃/Cs₃Cu₂I₅ films exhibited UV light absorption, a high average visible transmission (AVT) of 86.70%, and dual-color white emission between 350 and 760 nm. Importantly, the TLSCs incorporated with the CsCu₂I₃/Cs₃Cu₂I₅ films exhibited an impressive optical conversion efficiency of 1.15% under keeping a high AVT of 86.70%. Meanwhile, the TLSCs incorporated with the heterophase films showed considerable stability under ambient conditions. The CIE 1960 color coordinates (0.2082, 0.4680) of the TLSCs incorporated with the CsCu₂I₃/Cs₃Cu₂I₅ films showed excellent aesthetic quality as compared with those of the TLSCs incorporated with lead-based perovskites. Our finding offers a strategy to prepare lead-free metal halides toward high-performance TLSCs and future transparent PV windows.

Keywords: Cs3Cu2I5; CsCu2I3; lead-free perovskite; luminescent solar concentrators; transparent photovoltaic.