%0 Journal Article %1 doi:10.1021/acsenergylett.7b00751 %A Lau, Cho Fai Jonathan %A Zhang, Meng %A Deng, Xiaofan %A Zheng, Jianghui %A Bing, Jueming %A Ma, Qingshan %A Kim, Jincheol %A Hu, Long %A Green, Martin A. %A Huang, Shujuan %A Ho-Baillie, Anita %D 0 %J ACS Energy Letters %K doping perovskite stability strontium %N 0 %P 2319-2325 %R 10.1021/acsenergylett.7b00751 %T Strontium-Doped Low-Temperature-Processed CsPbI2Br Perovskite Solar Cells %U http://dx.doi.org/10.1021/acsenergylett.7b00751 %V 0 %X Cesium (Cs) metal halide perovskites for photovoltaics have gained research interest due to their better thermal stability compared to their organic–inorganic counterparts. However, demonstration of highly efficient Cs-based perovskite solar cells requires high annealing temperature, which limits their use in multijunction devices. In this work, low-temperature-processed cesium lead (Pb) halide perovskite solar cells are demonstrated. We have also successfully incorporated the less toxic strontium (Sr) at a low concentration that partially substitutes Pb in CsPb1–xSrxI2Br. The crystallinity, morphology, absorption, photoluminescence, and elemental composition of this low-temperature-processed CsPb1–xSrxI2Br are studied. It is found that the surface of the perovskite film is enriched with Sr, providing a passivating effect. At the optimal concentration (x = 0.02), a mesoscopic perovskite solar cell using CsPb0.98Sr0.02I2Br achieves a stabilized efficiency at 10.8\%. This work shows the potential of inorganic perovskite, stimulating further development of this material.

@article{doi:10.1021/acsenergylett.7b00751, abstract = { Cesium (Cs) metal halide perovskites for photovoltaics have gained research interest due to their better thermal stability compared to their organic–inorganic counterparts. However, demonstration of highly efficient Cs-based perovskite solar cells requires high annealing temperature, which limits their use in multijunction devices. In this work, low-temperature-processed cesium lead (Pb) halide perovskite solar cells are demonstrated. We have also successfully incorporated the less toxic strontium (Sr) at a low concentration that partially substitutes Pb in CsPb1–xSrxI2Br. The crystallinity, morphology, absorption, photoluminescence, and elemental composition of this low-temperature-processed CsPb1–xSrxI2Br are studied. It is found that the surface of the perovskite film is enriched with Sr, providing a passivating effect. At the optimal concentration (x = 0.02), a mesoscopic perovskite solar cell using CsPb0.98Sr0.02I2Br achieves a stabilized efficiency at 10.8\%. This work shows the potential of inorganic perovskite, stimulating further development of this material. }, added-at = {2017-09-18T14:11:51.000+0200}, author = {Lau, Cho Fai Jonathan and Zhang, Meng and Deng, Xiaofan and Zheng, Jianghui and Bing, Jueming and Ma, Qingshan and Kim, Jincheol and Hu, Long and Green, Martin A. and Huang, Shujuan and Ho-Baillie, Anita}, biburl = {https://www.bibsonomy.org/bibtex/2549bd7ab51bcb988c7115043bb401b99/fabianopkm}, doi = {10.1021/acsenergylett.7b00751}, eprint = {http://dx.doi.org/10.1021/acsenergylett.7b00751}, interhash = {4bd22614992a46faea47cb731461bf95}, intrahash = {549bd7ab51bcb988c7115043bb401b99}, journal = {ACS Energy Letters}, keywords = {doping perovskite stability strontium}, number = 0, pages = {2319-2325}, timestamp = {2017-09-18T14:11:51.000+0200}, title = {Strontium-Doped Low-Temperature-Processed CsPbI2Br Perovskite Solar Cells}, url = {http://dx.doi.org/10.1021/acsenergylett.7b00751}, volume = 0, year = 0 }