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 language | English |
|---|---|
| Pages (from-to) | 8910-8915 |
| Number of pages | 6 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 113 |
| Issue number | 32 |
| DOIs | |
| Publication status | Published - Aug 9 2016 |
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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 journal › Article
}
TY - JOUR
T1 - Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic-inorganic trihalide perovskites
AU - Kong, Lingping
AU - Liua, Gang
AU - Gong, Jue
AU - Hu, Qingyang
AU - Schaller, Richard D
AU - Dera, Przemyslaw
AU - Zhang, Dongzhou
AU - Liu, Zhenxian
AU - Yang, Wenge
AU - Zhu, Kai
AU - Tang, Yuzhao
AU - Wang, Chuanyi
AU - Wei, Su Huai
AU - Xu, Tao
AU - Mao, Ho Kwang
PY - 2016/8/9
Y1 - 2016/8/9
N2 - 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.
AB - 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.
KW - Band gap
KW - Carrier lifetime
KW - High pressure
KW - Perovskite|solar cell
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UR - http://www.scopus.com/inward/citedby.url?scp=84982999550&partnerID=8YFLogxK
U2 - 10.1073/pnas.1609030113
DO - 10.1073/pnas.1609030113
M3 - Article
VL - 113
SP - 8910
EP - 8915
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
SN - 0027-8424
IS - 32
ER -