Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic-inorganic trihalide perovskites
Abstract
The emergence of organic-inorganic hybrid lead triiodide perovskite materials promises a low-cost and high-efficiency photovoltaic technology. Although the high-power conversion efficiency of this technology has been successfully demonstrated, further improvement appears to be limited without further narrowing the band gap while also retaining or even synergistically prolonging the carrier lifetime. We report a synergistic enhancement in both band gap narrowing and carrier-lifetime prolongation (up to 70% to ∼100% increase) of organic-inorganic hybrid lead triiodide perovskite materials under mild pressures below ∼0.3 GPa. This work could open new territory in materials science, and new materials could be invented using the experimental and theoretical guidelines we have established herein.
- Publication:
-
Proceedings of the National Academy of Science
- Pub Date:
- August 2016
- DOI:
- 10.1073/pnas.1609030113
- arXiv:
- arXiv:1607.01607
- Bibcode:
- 2016PNAS..113.8910K
- Keywords:
-
- perovskite;
- solar cell;
- high pressure;
- band gap;
- carrier lifetime;
- Condensed Matter - Materials Science;
- Physics - Optics
- E-Print:
- 23 pages, 4 figures