%0 Journal Article %1 wu2019chemically %A Wu, Shaohang %A Chen, Rui %A Zhang, Shasha %A Babu, B. Hari %A Yue, Youfeng %A Zhu, Hongmei %A Yang, Zhichun %A Chen, Chuanliang %A Chen, Weitao %A Huang, Yuqian %A Fang, Shaoying %A Liu, Tianlun %A Han, Liyuan %A Chen, Wei %D 2019 %J Nature Communications %K bismuth chemically inert interlayer %N 1 %P 1161-- %R 10.1038/s41467-019-09167-0 %T A chemically inert bismuth interlayer enhances long-term stability of inverted perovskite solar cells %U https://doi.org/10.1038/s41467-019-09167-0 %V 10 %X Long-term stability remains a key issue impeding the commercialization of halide perovskite solar cells (HPVKSCs). The diffusion of molecules and ions causes irreversible degradation to photovoltaic device performance. Here, we demonstrate a facile strategy for producing highly stable HPVKSCs by using a thin but compact semimetal Bismuth interlayer. The Bismuth film acts as a robust permeation barrier that both insulates the perovskite from intrusion by undesirable external moisture and protects the metal electrode from iodine corrosion. The Bismuth-interlayer-based devices exhibit greatly improved stability when subjected to humidity, thermal and light stresses. The unencapsulated device retains 88% of its initial efficiency in ambient air in the dark for over 6000 h; the devices maintain 95% and 97% of their initial efficiencies after 85 °C thermal aging and light soaking in nitrogen atmosphere for 500 h, respectively. These sound stability parameters are among the best for planar structured HPVKSCs reported to date.

@article{wu2019chemically, abstract = {Long-term stability remains a key issue impeding the commercialization of halide perovskite solar cells (HPVKSCs). The diffusion of molecules and ions causes irreversible degradation to photovoltaic device performance. Here, we demonstrate a facile strategy for producing highly stable HPVKSCs by using a thin but compact semimetal Bismuth interlayer. The Bismuth film acts as a robust permeation barrier that both insulates the perovskite from intrusion by undesirable external moisture and protects the metal electrode from iodine corrosion. The Bismuth-interlayer-based devices exhibit greatly improved stability when subjected to humidity, thermal and light stresses. The unencapsulated device retains 88% of its initial efficiency in ambient air in the dark for over 6000 h; the devices maintain 95% and 97% of their initial efficiencies after 85 °C thermal aging and light soaking in nitrogen atmosphere for 500 h, respectively. These sound stability parameters are among the best for planar structured HPVKSCs reported to date.}, added-at = {2019-03-14T11:25:02.000+0100}, author = {Wu, Shaohang and Chen, Rui and Zhang, Shasha and Babu, B. Hari and Yue, Youfeng and Zhu, Hongmei and Yang, Zhichun and Chen, Chuanliang and Chen, Weitao and Huang, Yuqian and Fang, Shaoying and Liu, Tianlun and Han, Liyuan and Chen, Wei}, biburl = {https://www.bibsonomy.org/bibtex/27b0484d5dcacdb8c679e6abef8fbdeef/sere}, doi = {10.1038/s41467-019-09167-0}, interhash = {6254e1e08e2225d549f30e70365181ba}, intrahash = {7b0484d5dcacdb8c679e6abef8fbdeef}, issn = {20411723}, journal = {Nature Communications}, keywords = {bismuth chemically inert interlayer}, number = 1, pages = {1161--}, refid = {Wu2019}, timestamp = {2019-03-14T11:25:02.000+0100}, title = {A chemically inert bismuth interlayer enhances long-term stability of inverted perovskite solar cells}, url = {https://doi.org/10.1038/s41467-019-09167-0}, volume = 10, year = 2019 }