Journal Article Origin of Open-Circuit Voltage Loss in Polymer Solar Cells and Perovskite Solar Cells

Kim, Hyungdo  ,  Yanagawa, Nayu  ,  Shimazaki, Ai  ,  Endo, Masaru  ,  Wakamiya, Atsushi  ,  Ohkita, Hideo  ,  Benten, Hiroaki  ,  Ito, Shinzaburo

9 ( 23 )  , pp.19988 - 19997 , 2017-05-29 , American Chemical Society (ACS)
ISSN:1944-8244
Description
Herein, the open-circuit voltage (V[OC]) loss in both polymer solar cells and perovskite solar cells is quantitatively analyzed by measuring the temperature dependence of V[OC] in order to discuss the difference in the primary loss mechanism of V[OC] between them. As a result, the photon energy loss for polymer solar cells is in the range of 0.7–1.4 eV, which is ascribed to temperature-independent and -dependent loss mechanisms while that for perovskite solar cells is as small as about 0.5 eV, which is ascribed to a temperature-dependent loss mechanism. This difference is attributed to the different charge generation and recombination mechanisms between the two devices. The potential strategies for the improvement of V[OC] in both solar cells are further discussed on the basis of the experimental data.
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http://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/226372/1/acsami.7b03694.pdf

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