Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells

Haizhou Lu; Yuhang Liu; Paramvir Ahlawat; Aditya Mishra; Wolfgang R. Tress; Felix T. Eickemeyer; Yingguo Yang; Fan Fu; Zaiwei Wang; Claudia E. Avalos; Brian I. Carlsen; Anand Agarwalla; Xin Zhang; Xiaoguo Li; Yiqiang Zhan; Shaik M. Zakeeruddin; Lyndon Emsley; Ursula Rothlisberger; Lirong Zheng; Anders Hagfeldt; Michael Grätzel

doi:10.1126/science.abb8985

Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells

Haizhou Lu, Yuhang Liu, Paramvir Ahlawat, Aditya Mishra, Wolfgang R. Tress, Felix T. Eickemeyer, Yingguo Yang, Fan Fu, Zaiwei Wang, Claudia E. Avalos, Brian I. Carlsen, Anand Agarwalla, Xin Zhang, Xiaoguo Li, Yiqiang Zhan, Shaik M. Zakeeruddin, Lyndon Emsley, Ursula Rothlisberger, Lirong Zheng, Anders HagfeldtMichael Grätzel

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Mixtures of cations or halides with FAPbI 3 (where FA is formamidinium) lead to high efficiency in perovskite solar cells (PSCs) but also to blue-shifted absorption and long-term stability issues caused by loss of volatile methylammonium (MA) and phase segregation. We report a deposition method using MA thiocyanate (MASCN) or FASCN vapor treatment to convert yellow δ-FAPbI 3 perovskite films to the desired pure α-phase. NMR quantifies MA incorporation into the framework. Molecular dynamics simulations show that SCN - anions promote the formation and stabilization of α-FAPbI 3 below the thermodynamic phase-transition temperature. We used these low-defect-density α-FAPbI 3 films to make PSCs with >23% power-conversion efficiency and long-term operational and thermal stability, as well as a low (330 millivolts) open-circuit voltage loss and a low (0.75 volt) turn-on voltage of electroluminescence.

Original language	English (US)
Article number	eabb8985
Journal	Science
Volume	370
Issue number	6512
DOIs	https://doi.org/10.1126/science.abb8985
State	Published - Oct 2 2020

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Lu, H., Liu, Y., Ahlawat, P., Mishra, A., Tress, W. R., Eickemeyer, F. T., Yang, Y., Fu, F., Wang, Z., Avalos, C. E., Carlsen, B. I., Agarwalla, A., Zhang, X., Li, X., Zhan, Y., Zakeeruddin, S. M., Emsley, L., Rothlisberger, U., Zheng, L., ... Grätzel, M. (2020). Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells. Science, 370(6512), Article eabb8985. https://doi.org/10.1126/science.abb8985

Lu, H, Liu, Y, Ahlawat, P, Mishra, A, Tress, WR, Eickemeyer, FT, Yang, Y, Fu, F, Wang, Z, Avalos, CE, Carlsen, BI, Agarwalla, A, Zhang, X, Li, X, Zhan, Y, Zakeeruddin, SM, Emsley, L, Rothlisberger, U, Zheng, L, Hagfeldt, A & Grätzel, M 2020, 'Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells', Science, vol. 370, no. 6512, eabb8985. https://doi.org/10.1126/science.abb8985

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title = "Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells",

abstract = "Mixtures of cations or halides with FAPbI 3 (where FA is formamidinium) lead to high efficiency in perovskite solar cells (PSCs) but also to blue-shifted absorption and long-term stability issues caused by loss of volatile methylammonium (MA) and phase segregation. We report a deposition method using MA thiocyanate (MASCN) or FASCN vapor treatment to convert yellow δ-FAPbI 3 perovskite films to the desired pure α-phase. NMR quantifies MA incorporation into the framework. Molecular dynamics simulations show that SCN - anions promote the formation and stabilization of α-FAPbI 3 below the thermodynamic phase-transition temperature. We used these low-defect-density α-FAPbI 3 films to make PSCs with >23% power-conversion efficiency and long-term operational and thermal stability, as well as a low (330 millivolts) open-circuit voltage loss and a low (0.75 volt) turn-on voltage of electroluminescence. ",

author = "Haizhou Lu and Yuhang Liu and Paramvir Ahlawat and Aditya Mishra and Tress, {Wolfgang R.} and Eickemeyer, {Felix T.} and Yingguo Yang and Fan Fu and Zaiwei Wang and Avalos, {Claudia E.} and Carlsen, {Brian I.} and Anand Agarwalla and Xin Zhang and Xiaoguo Li and Yiqiang Zhan and Zakeeruddin, {Shaik M.} and Lyndon Emsley and Ursula Rothlisberger and Lirong Zheng and Anders Hagfeldt and Michael Gr{\"a}tzel",

year = "2020",

month = oct,

day = "2",

doi = "10.1126/science.abb8985",

language = "English (US)",

volume = "370",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

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T1 - Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells

AU - Lu, Haizhou

AU - Liu, Yuhang

AU - Ahlawat, Paramvir

AU - Mishra, Aditya

AU - Tress, Wolfgang R.

AU - Eickemeyer, Felix T.

AU - Yang, Yingguo

AU - Fu, Fan

AU - Wang, Zaiwei

AU - Avalos, Claudia E.

AU - Carlsen, Brian I.

AU - Agarwalla, Anand

AU - Zhang, Xin

AU - Li, Xiaoguo

AU - Zhan, Yiqiang

AU - Zakeeruddin, Shaik M.

AU - Emsley, Lyndon

AU - Rothlisberger, Ursula

AU - Zheng, Lirong

AU - Hagfeldt, Anders

AU - Grätzel, Michael

PY - 2020/10/2

Y1 - 2020/10/2

N2 - Mixtures of cations or halides with FAPbI 3 (where FA is formamidinium) lead to high efficiency in perovskite solar cells (PSCs) but also to blue-shifted absorption and long-term stability issues caused by loss of volatile methylammonium (MA) and phase segregation. We report a deposition method using MA thiocyanate (MASCN) or FASCN vapor treatment to convert yellow δ-FAPbI 3 perovskite films to the desired pure α-phase. NMR quantifies MA incorporation into the framework. Molecular dynamics simulations show that SCN - anions promote the formation and stabilization of α-FAPbI 3 below the thermodynamic phase-transition temperature. We used these low-defect-density α-FAPbI 3 films to make PSCs with >23% power-conversion efficiency and long-term operational and thermal stability, as well as a low (330 millivolts) open-circuit voltage loss and a low (0.75 volt) turn-on voltage of electroluminescence.

AB - Mixtures of cations or halides with FAPbI 3 (where FA is formamidinium) lead to high efficiency in perovskite solar cells (PSCs) but also to blue-shifted absorption and long-term stability issues caused by loss of volatile methylammonium (MA) and phase segregation. We report a deposition method using MA thiocyanate (MASCN) or FASCN vapor treatment to convert yellow δ-FAPbI 3 perovskite films to the desired pure α-phase. NMR quantifies MA incorporation into the framework. Molecular dynamics simulations show that SCN - anions promote the formation and stabilization of α-FAPbI 3 below the thermodynamic phase-transition temperature. We used these low-defect-density α-FAPbI 3 films to make PSCs with >23% power-conversion efficiency and long-term operational and thermal stability, as well as a low (330 millivolts) open-circuit voltage loss and a low (0.75 volt) turn-on voltage of electroluminescence.

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Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells

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