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High-performance methylammonium-free ideal-band-gap perovskite solar cells
- Source :
- Matter; April 2021, Vol. 4 Issue: 4 p1365-1376, 12p
- Publication Year :
- 2021
-
Abstract
- The development of mixed tin-lead (Sn-Pb)-based perovskite solar cells (PSCs) with low band gap (1.2–1.4 eV) has become critical not only for pushing single-junction devices toward the maximum efficiency given by the Shockley-Queisser limit, but also for enabling all-perovskite tandem devices beyond this limit. However, achieving high power-conversion efficiency (PCE) and long-term device operation stability simultaneously remains a significant challenge for Sn-Pb-based PSCs. Here, we demonstrate near ideal-band-gap (∼1.34 eV) methylammonium-free Sn-Pb-based PSCs with high efficiency (∼20%) and promising operational stability of maintaining >80% of initial PCE over 750 h under maximum-power-point tracking. The key to this success is the use of a SnCl2⋅3FACl complex additive that improves the microstructure and reduces the development of residual stress in the Sn-Pb perovskite thin films, which in turn enhances the efficiency and stability of the Sn-Pb-based ideal-band-gap PSCs.
Details
- Language :
- English
- ISSN :
- 25902385
- Volume :
- 4
- Issue :
- 4
- Database :
- Supplemental Index
- Journal :
- Matter
- Publication Type :
- Periodical
- Accession number :
- ejs55735494
- Full Text :
- https://doi.org/10.1016/j.matt.2021.01.003