Issue 5, 2024

One-step dual-additive passivated wide-bandgap perovskites to realize 44.72%-efficient indoor photovoltaics

Abstract

The reduction of bulk trap defects in bromine-rich wide-bandgap (WBG) perovskites is crucial to enhancing open-circuit voltage (Voc) and fill factor (FF) towards high-performance indoor photovoltaics (IPVs). Here, we report one-step processed composite-based WBG perovskite adducts by adding oleylammonium iodide solution in trichloromethane as dual additives to the WBG perovskite precursors. The incorporation of a trace amount of dual additives enables a high-quality and less defective WBG perovskite film with mitigated halide segregation, leading to the suppression of bulk trap-induced non-radiative recombination losses. The NiOx-based inverted champion cell under one-sun illumination generates a record power conversion efficiency (PCE) of 21.97%, an impressive FF of 83.4%, a Jsc of 21.56 mA cm−2, and a Voc of 1.25 V for 1.71-electon-volt WBG perovskites. Such devices also show high operational stability over 800 hours during T95 lifetime measurements. Our cells under U30 light with 1000 Lux (338.2 μW cm−2) can obtain a certified record PCE of 44.72% with a high Voc of 1.069 V and an FF of 82.3%. This is, to our knowledge, the best reported certified performance for perovskite-based IPVs.

Graphical abstract: One-step dual-additive passivated wide-bandgap perovskites to realize 44.72%-efficient indoor photovoltaics

Supplementary files

Article information

Article type
Communication
Submitted
22 Nov 2023
Accepted
11 Jan 2024
First published
12 Jan 2024

Energy Environ. Sci., 2024,17, 1637-1644

One-step dual-additive passivated wide-bandgap perovskites to realize 44.72%-efficient indoor photovoltaics

Q. Ma, Y. Wang, L. Liu, P. Yang, W. He, X. Zhang, J. Zheng, M. Ma, M. Wan, Y. Yang, C. Zhang, T. Mahmoudi, S. Wu, C. Liu, Y. Hahn and Y. Mai, Energy Environ. Sci., 2024, 17, 1637 DOI: 10.1039/D3EE04022D

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