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首页> 外文期刊>Advanced energy materials >Toward Broad Spectral Response Inverted Perovskite Solar Cells: Insulating Quantum-Cutting Perovskite Nanophosphors and Multifunctional Ternary Organic Bulk-Heterojunction
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Toward Broad Spectral Response Inverted Perovskite Solar Cells: Insulating Quantum-Cutting Perovskite Nanophosphors and Multifunctional Ternary Organic Bulk-Heterojunction

机译：Toward Broad Spectral Response Inverted Perovskite Solar Cells: Insulating Quantum-Cutting Perovskite Nanophosphors and Multifunctional Ternary Organic Bulk-Heterojunction

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摘要

Extending near-infrared (NIR) spectral response and increasing ultraviolet utilization is still a challenge in the context of improving power conversion efficiency (PCE) for perovskite solar cells (PSCs). In this work, to extend NIR light-harvesting of PSCs, a novel COTIC-4F: PC61BM: PTB7-Th ternary organic bulk-heterojunction together with Au nanotriangles is integrated on the PSCs. The NIR spectral response is thus extended to 1100 nm. In fact, the COTIC-4F: PC61BM: PTB7-Th layer enables multi-functional effects, which can serve as electron transport, trap passivation, and moisture barrier layer in addition to NIR light harvesting. For increasing UV utilization, CsPbCl3:Yb3+, Ce3+, Cr3+ nanophosphors with photoluminescent quantum yield close to 200% are fabricated, which demonstrate excellent down-conversion ability. Then, CsPbCl3: Yb3+, Ce3+, Cr3+/polymethylmethacrylate composite films are self-assembled on a hybrid device, resulting in a 6.2% relative enhancement of short circuit current density. After simultaneously improving the NIR and UV spectral response of device, the PCE is increased significantly from 20.52% to 23.40% and the Jsc is increased from 21.79 to 25.96 mA cm(-2), representing one of the highest PCE and maximum Jsc enhancements in the reported inverted hybrid organic/PSCs. This work represents an effective and general strategy for obtaining efficient and stable PSC devices with extremely broad spectral responses.

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