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Two-dimensional perovskite solar cells with high luminescence and ultra-low open-circuit voltage deficit
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-10-02 , DOI: 10.1039/d0ta08359c Xiaomei Lian 1, 2, 3, 4, 5 , Lijian Zuo 1, 2, 3, 4, 5 , Haotian Wu 1, 2, 3, 4, 5 , Guanqing Zhou 4, 5, 6, 7 , Chen Lin 4, 5, 6, 7 , Haiming Zhu 4, 5, 6, 7 , Gang Wu 1, 2, 3, 4, 5 , David Cahen 8, 9, 10, 11, 12 , Hongzheng Chen 1, 2, 3, 4, 5
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-10-02 , DOI: 10.1039/d0ta08359c Xiaomei Lian 1, 2, 3, 4, 5 , Lijian Zuo 1, 2, 3, 4, 5 , Haotian Wu 1, 2, 3, 4, 5 , Guanqing Zhou 4, 5, 6, 7 , Chen Lin 4, 5, 6, 7 , Haiming Zhu 4, 5, 6, 7 , Gang Wu 1, 2, 3, 4, 5 , David Cahen 8, 9, 10, 11, 12 , Hongzheng Chen 1, 2, 3, 4, 5
Affiliation
High luminescence efficiency of the halide perovskite absorber layer in perovskite solar cells (PVSCs) will reduce the open-circuit voltage (Voc) loss and further increase the cell efficiency. Still, while quasi-2D-structure perovskite films exhibit high emissivity in light-emitting devices, quasi-2D PVSCs show severe Voc loss associated with non-radiative recombination. Here we demonstrate how the use of highly luminescent PEA0.2BA1.8MA3Pb4I13 in quasi-2D PVSCs allows, via Cl− passivation and heat-light post-co-treatment, a champion external electroluminescence quantum efficiency around 2.3% and a record low Voc deficit of 0.36 eV. To our knowledge, this is the lowest Voc loss for quasi-2D PVSCs and among the lowest for any type of PVSCs. As a result, high performance quasi-2D PVSCs are obtained, with a Voc up to 1.29 V and 15.81% efficiency, showing excellent stability, and retain 98% of the original efficiency after heating at 85 °C for 1590 h. This work paves the way toward highly luminescent and efficient quasi-2D PVSCs.
中文翻译:
具有高发光和超低开路电压亏缺的二维钙钛矿太阳能电池
钙钛矿太阳能电池(PVSC)中卤化物钙钛矿吸收层的高发光效率将减少开路电压(V oc)损失并进一步提高电池效率。尽管如此,虽然准2D结构的钙钛矿薄膜在发光器件中显示出高发射率,但准2D PVSC却显示出与非辐射复合相关的严重V oc损失。在这里,我们演示了如何使用高发光PEA的0.2 BA 1.8 MA 3铅4我13准2D PVSCs允许,通过氯-钝化和热光后共处理,卓越的外部电致发光量子效率约为2.3%,创纪录的低V oc缺陷为0.36 eV。据我们所知,这是准2D PVSC的最低V oc损耗,也是任何类型的PVSC的最低V oc损耗。结果,获得了高性能准2D PVSC,V oc高达1.29 V,效率为15.81%,表现出出色的稳定性,并在85°C加热1590 h后仍保持原始效率的98%。这项工作为高发光和高效的准2D PVSC铺平了道路。
更新日期:2020-10-20
中文翻译:
具有高发光和超低开路电压亏缺的二维钙钛矿太阳能电池
钙钛矿太阳能电池(PVSC)中卤化物钙钛矿吸收层的高发光效率将减少开路电压(V oc)损失并进一步提高电池效率。尽管如此,虽然准2D结构的钙钛矿薄膜在发光器件中显示出高发射率,但准2D PVSC却显示出与非辐射复合相关的严重V oc损失。在这里,我们演示了如何使用高发光PEA的0.2 BA 1.8 MA 3铅4我13准2D PVSCs允许,通过氯-钝化和热光后共处理,卓越的外部电致发光量子效率约为2.3%,创纪录的低V oc缺陷为0.36 eV。据我们所知,这是准2D PVSC的最低V oc损耗,也是任何类型的PVSC的最低V oc损耗。结果,获得了高性能准2D PVSC,V oc高达1.29 V,效率为15.81%,表现出出色的稳定性,并在85°C加热1590 h后仍保持原始效率的98%。这项工作为高发光和高效的准2D PVSC铺平了道路。