Author:
Kong Lingping,Liu 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
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.
Publisher
Proceedings of the National Academy of Sciences
Cited by
264 articles.
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