Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic-inorganic trihalide perovskites

Lingping Kong, Gang Liua, Jue Gong, Qingyang Hu, Richard D Schaller, Przemyslaw Dera, Dongzhou Zhang, Zhenxian Liu, Wenge Yang, Kai Zhu, Yuzhao Tang, Chuanyi Wang, Su Huai Wei, Tao Xu, Ho Kwang Mao

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

The organic-inorganic hybrid lead trihalide perovskites have been emerging as the most attractive photovoltaic materials. As regulated by Shockley-Queisser theory, a formidable materials science challenge for improvement to the next level requires further band-gap narrowing for broader absorption in solar spectrum, while retaining or even synergistically prolonging the carrier lifetime, a critical factor responsible for attaining the near-band-gap photovoltage. Herein, by applying controllable hydrostatic pressure, we have achieved unprecedented simultaneous enhancement in both band-gap narrowing and carrier-lifetime prolongation (up to 70% to ?100% increase) under mild pressures at ?0.3 GPa. The pressure-induced modulation on pure hybrid perovskites without introducing any adverse chemical or thermal effect clearly demonstrates the importance of band edges on the photon-electron interaction and maps a pioneering route toward a further increase in their photovoltaic performance.

Original languageEnglish
Pages (from-to)8910-8915
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume113
Issue number32
DOIs
Publication statusPublished - Aug 9 2016

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Carrier lifetime
Energy gap
Hydrostatic pressure
Materials science
Thermal effects
Photons
Modulation
Electrons

Keywords

  • Band gap
  • Carrier lifetime
  • High pressure
  • Perovskite|solar cell

ASJC Scopus subject areas

  • General

Cite this

Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic-inorganic trihalide perovskites. / Kong, Lingping; Liua, Gang; Gong, Jue; Hu, Qingyang; Schaller, Richard D; Dera, Przemyslaw; Zhang, Dongzhou; Liu, Zhenxian; Yang, Wenge; Zhu, Kai; Tang, Yuzhao; Wang, Chuanyi; Wei, Su Huai; Xu, Tao; Mao, Ho Kwang.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 113, No. 32, 09.08.2016, p. 8910-8915.

Research output: Contribution to journalArticle

Kong, L, Liua, G, Gong, J, Hu, Q, Schaller, RD, Dera, P, Zhang, D, Liu, Z, Yang, W, Zhu, K, Tang, Y, Wang, C, Wei, SH, Xu, T & Mao, HK 2016, 'Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic-inorganic trihalide perovskites', Proceedings of the National Academy of Sciences of the United States of America, vol. 113, no. 32, pp. 8910-8915. https://doi.org/10.1073/pnas.1609030113
Kong, Lingping ; Liua, Gang ; Gong, Jue ; Hu, Qingyang ; Schaller, Richard D ; Dera, Przemyslaw ; Zhang, Dongzhou ; Liu, Zhenxian ; Yang, Wenge ; Zhu, Kai ; Tang, Yuzhao ; Wang, Chuanyi ; Wei, Su Huai ; Xu, Tao ; Mao, Ho Kwang. / Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic-inorganic trihalide perovskites. In: Proceedings of the National Academy of Sciences of the United States of America. 2016 ; Vol. 113, No. 32. pp. 8910-8915.
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