%0 Journal Article %1 doi:10.1021/acsenergylett.7b00980 %A Ji, Fuxiang %A Pang, Shuping %A Zhang, Lin %A Zong, Yingxia %A Cui, Guanglei %A Padture, Nitin P. %A Zhou, Yuanyuan %D 0 %J ACS Energy Letters %K boundary grain orientation perovskite %N 0 %P 2727-2733 %R 10.1021/acsenergylett.7b00980 %T Simultaneous Evolution of Uniaxially Oriented Grains and Ultralow-Density Grain-Boundary Network in CH3NH3PbI3 Perovskite Thin Films Mediated by Precursor Phase Metastability %U http://dx.doi.org/10.1021/acsenergylett.7b00980 %V 0 %X Solution-processed organic–inorganic halide perovskite (OIHP) thin films typically contain fine, randomly oriented grains and a high-density grain-boundary network, which are unfavorable for key film functions including charge transport and environmental stability. Here, we report a new chemical route for achieving CH3NH3PbI3 (MAPbI3) OIHP thin films comprising large, uniaxially oriented grains and an ultralow-density grain-boundary network. This route starts with a new metastable liquid-state precursor phase, MAPbI3·MACl·xCH3NH2, which converts to metastable MAPbI3·MACl and then to MAPbI3 OIHP upon stepwise release of volatile CH3NH2 and MACl. Perovskite solar cells made via this route show high power conversion efficiency of up to 19.4\%, with significantly enhanced environmental stability.

@article{doi:10.1021/acsenergylett.7b00980, abstract = { Solution-processed organic–inorganic halide perovskite (OIHP) thin films typically contain fine, randomly oriented grains and a high-density grain-boundary network, which are unfavorable for key film functions including charge transport and environmental stability. Here, we report a new chemical route for achieving CH3NH3PbI3 (MAPbI3) OIHP thin films comprising large, uniaxially oriented grains and an ultralow-density grain-boundary network. This route starts with a new metastable liquid-state precursor phase, MAPbI3·MACl·xCH3NH2, which converts to metastable MAPbI3·MACl and then to MAPbI3 OIHP upon stepwise release of volatile CH3NH2 and MACl. Perovskite solar cells made via this route show high power conversion efficiency of up to 19.4\%, with significantly enhanced environmental stability. }, added-at = {2017-11-13T16:52:33.000+0100}, author = {Ji, Fuxiang and Pang, Shuping and Zhang, Lin and Zong, Yingxia and Cui, Guanglei and Padture, Nitin P. and Zhou, Yuanyuan}, biburl = {https://www.bibsonomy.org/bibtex/298ab0f5411ba1518f7360ee632efa591/fabianopkm}, description = {Simultaneous Evolution of Uniaxially Oriented Grains and Ultralow-Density Grain-Boundary Network in CH3NH3PbI3 Perovskite Thin Films Mediated by Precursor Phase Metastability - ACS Energy Letters (ACS Publications)}, doi = {10.1021/acsenergylett.7b00980}, eprint = {http://dx.doi.org/10.1021/acsenergylett.7b00980}, interhash = {87f44be608ac08b48c89df5a4de9ad86}, intrahash = {98ab0f5411ba1518f7360ee632efa591}, journal = {ACS Energy Letters}, keywords = {boundary grain orientation perovskite}, number = 0, pages = {2727-2733}, timestamp = {2017-11-13T16:52:33.000+0100}, title = {Simultaneous Evolution of Uniaxially Oriented Grains and Ultralow-Density Grain-Boundary Network in CH3NH3PbI3 Perovskite Thin Films Mediated by Precursor Phase Metastability}, url = {http://dx.doi.org/10.1021/acsenergylett.7b00980}, volume = 0, year = 0 }