期刊
ACS ENERGY LETTERS
卷 3, 期 8, 页码 1781-1786出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.8b00871
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资金
- SNSF NRP 70 Project [407040_154056]
- Solaronix, Aubonne, Switzerland [CTI 15864.2 PFNM-NM]
- PeroBOOST project [EFRE-0800120, NW-1-1040h]
- BMBF [03SF0517A]
- Swiss National Science Foundation (SNSF) [PZENP2_173641]
Hybrid perovskite solar cells have been creating considerable excitement in the photovoltaic community. However, they still rely on toxic elements, which impose severe limits on their commercialization. Lead-free double hybrid perovskites in the form of Cs2AgBiBr6 have been shown to be a promising nontoxic and highly stable alternative. Nevertheless, device development is still in its infancy, and performance is affected by severe hysteresis. Here we realize for the first time hysteresis-free mesoporous double-perovskite solar cells with no s-shape in the device characteristic and increased device open-circuit voltage. This has been realized by fine-tuning the material deposition parameters, enabling the growth of a highly uniform and compact Cs2AgBiBr6, and by engineering the device interfaces by screening different molecular and polymeric hole-transporting materials. Our work represents a crucial step forward in lead-free double perovskites with significant potential for closing the gap for their market uptake.
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