Journal article

Transient Energy Reservoir in 2D Perovskites

Z Gan, X Wen, C Zhou, W Chen, F Zheng, S Yang, JA Davis, PC Tapping, TW Kee, H Zhang, B Jia

Advanced Optical Materials | Published : 2019

Abstract

2D Ruddlesden−Popper type perovskites have attracted enormous attention due to their natural multiquantum-well structure. However, there is still mystery regarding the behavior of photocarriers, especially the exciton fine structure behind the excellent optoelectronic performance. The coexistence of two strikingly different decay components in time-resolved photoluminescence is inconsistent with the high internal quantum yield (QY = ≈0.7) in the conventional model for radiative and nonradiative recombinations (QY = τ /(τ + τ ) = 17%). Here it is revealed that there is a special transient energy reservoir outcompeting nonradiative loss in 2D Ruddlesden−Popper type perovskites. Upon optical..

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