Publication Date:
2017-01-12
Description:
Author(s): Takumi Yamada, Yasuhiro Yamada, Yumi Nakaike, Atsushi Wakamiya, and Yoshihiko Kanemitsu Lead halide perovskite solar cells have already reached 22% efficiency, but the physical reasons w h y , and the limiting processes, remain unclear. The authors show that p h o t o n r e c y c l i n g (emission and reabsorption) causes unusually large carrier diffusion lengths in this class of photovoltaic absorber, with direct evidence of strong band-to-band transitions and efficient radiative recombination. These results will drive the improvement of such solar cells. [Phys. Rev. Applied 7, 014001] Published Tue Jan 03, 2017
Electronic ISSN:
2331-7019
Topics:
Physics
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