Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 51, Pages 26440-26453Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202108800
Keywords
charge transport layer; energy-level alignment; interfaces; perovskites; solar cells
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Funding
- National Natural Science Foundation of China [51972255]
- Fundamental Research Funds for the Central Universities [GK202102001]
- 111 Project [B21005]
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Metal halide inorganic perovskite materials are of interest for photovoltaic applications due to their superior thermal stability. Solar cells based on inorganic perovskites have achieved a PCE over 20%, with more room for improvement compared to organic-inorganic hybrid perovskite solar cells. Interfaces play a crucial role in limiting the photovoltage and charge extraction efficiency in inorganic perovskite solar cells.
Owing to their superior thermal stability, metal halide inorganic perovskite materials continue to attract interest for photovoltaics applications. The highest reported power conversion efficiency (PCE) for solar cells based on inorganic perovskites is over 20 %. As this PCE corresponds to 73 % of the theoretical limit, there remains more room for further improving the device PCEs than for improving organic-inorganic hybrid perovskite solar cells (PSCs). The main loss is in the photovoltage, which is limited by interfaces in terms of non-radiative recombination caused by traps and energy-level mismatch. Furthermore, inefficient charge extraction at interfacial contacts reduces the photocurrent and fill factor. This Minireview summarizes the recent developments in the fundamental understanding of how the interfaces and interfacial layers influence the performance of solar cells based on inorganic perovskite absorbers. An outlook for the development of highly efficient and stable inorganic PSCs from the interface point of view is also given.
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