Potassium Incorporation for Enhanced Performance and Stability of Fully Inorganic Cesium Lead Halide Perovskite Solar Cells

Jae Keun Nam; Sung Uk Chai; Wonhee Cha; Yung Ji Choi; Wanjung Kim; Myung Sun Jung; Jeong Kwon; Dongho Kim; Jong Hyeok Park

doi:10.1021/acs.nanolett.7b00050

Potassium Incorporation for Enhanced Performance and Stability of Fully Inorganic Cesium Lead Halide Perovskite Solar Cells

Jae Keun Nam, Sung Uk Chai, Wonhee Cha, Yung Ji Choi, Wanjung Kim, Myung Sun Jung, Jeong Kwon, Dongho Kim, Jong Hyeok Park

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

397 Citations (Scopus)

Abstract

Thermally unstable nature of hybrid organic-inorganic perovskites has been a major obstacle to fabricating the long-term operational device. A cesium lead halide perovskite has been suggested as an alternative light absorber, due to its superb thermal stability. However, the phase instability and poor performance are hindering the further progress. Here, cesium lead halide perovskite solar cells with enhanced performance and stability are demonstrated via incorporating potassium cations. Based on Cs_0.925K_0.075PbI₂Br, the planar-architecture device achieves a power conversion efficiency of 10.0%, which is a remarkable record in the field of inorganic perovskite solar cells. In addition, the device shows an extended operational lifetime against air. Our research will stimulate the development of cesium lead halide perovskite materials for next-generation photovoltaics.

Original language	English
Pages (from-to)	2028-2033
Number of pages	6
Journal	Nano letters
Volume	17
Issue number	3
DOIs	https://doi.org/10.1021/acs.nanolett.7b00050
Publication status	Published - 2017 Mar 8

Bibliographical note

Funding Information:
J.H.P. acknowledges the support from National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2013R1A2A1A09014038, 2015M1A2A2074663, 2014M3A7B4052200). D.K. acknowledges the support from the National Research Foundation of Korea (NRF) grants funded by the Ministry of Science, ICT Future Planning (MSIP) of Korea under contracts NRF-2012M3A6A7054861 (Global Frontier R and D Program on Center for Multiscale Energy System).

Publisher Copyright:
© 2017 American Chemical Society.

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.7b00050

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title = "Potassium Incorporation for Enhanced Performance and Stability of Fully Inorganic Cesium Lead Halide Perovskite Solar Cells",

abstract = "Thermally unstable nature of hybrid organic-inorganic perovskites has been a major obstacle to fabricating the long-term operational device. A cesium lead halide perovskite has been suggested as an alternative light absorber, due to its superb thermal stability. However, the phase instability and poor performance are hindering the further progress. Here, cesium lead halide perovskite solar cells with enhanced performance and stability are demonstrated via incorporating potassium cations. Based on Cs0.925K0.075PbI2Br, the planar-architecture device achieves a power conversion efficiency of 10.0%, which is a remarkable record in the field of inorganic perovskite solar cells. In addition, the device shows an extended operational lifetime against air. Our research will stimulate the development of cesium lead halide perovskite materials for next-generation photovoltaics.",

author = "Nam, {Jae Keun} and Chai, {Sung Uk} and Wonhee Cha and Choi, {Yung Ji} and Wanjung Kim and Jung, {Myung Sun} and Jeong Kwon and Dongho Kim and Park, {Jong Hyeok}",

note = "Funding Information: J.H.P. acknowledges the support from National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2013R1A2A1A09014038, 2015M1A2A2074663, 2014M3A7B4052200). D.K. acknowledges the support from the National Research Foundation of Korea (NRF) grants funded by the Ministry of Science, ICT Future Planning (MSIP) of Korea under contracts NRF-2012M3A6A7054861 (Global Frontier R and D Program on Center for Multiscale Energy System). Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

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AU - Choi, Yung Ji

AU - Kim, Wanjung

AU - Jung, Myung Sun

AU - Kwon, Jeong

AU - Kim, Dongho

AU - Park, Jong Hyeok

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PY - 2017/3/8

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Potassium Incorporation for Enhanced Performance and Stability of Fully Inorganic Cesium Lead Halide Perovskite Solar Cells

Abstract

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