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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Ambient-Stable Cubic-Phase Hybrid Perovskite Reaching the Shockley-Queisser Fill Factor Limit via Inorganic Additive-Assisted Process

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Title
Ambient-Stable Cubic-Phase Hybrid Perovskite Reaching the Shockley-Queisser Fill Factor Limit via Inorganic Additive-Assisted Process
Author
Yoon, TaeseungKim, Gi-HwanMyung, Chang WooKajal, SandeepJeong, JaekiKim, Jae WonKim, Jin YoungKim, Kwang S.
Issue Date
2018-11
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED ENERGY MATERIALS, v.1, no.11, pp.5865 - 5871
Abstract
Additive-assisted organic-inorganic perovskite materials have attracted substantial attention as photovoltaic light absorbers which lead to outstanding power conversion efficiency. Here we report an easy and effective fabrication of cubic-phase perovskite with an inorganic molecule additive like hydrazinium chloride (N2H5Cl, to be denoted as HZCl). We predict that this inorganic cation of N2H5+, which can substitute for the organic A-site in the perovskite structure, can tune Fröhlich polaron properties by controlling the interaction strength and the number of proton coordinations to halide. This prediction is experimentally demonstrated with an optimized perovskite device with 2% N2H5Cl additive, which exhibits an unprecedented 85% fill factor (FF) with the highest value close to the Shockley-Queisser limit. An extra power conversion efficiency (PCE) of 2.3% and a fill factor (FF) efficiency of 14% are boosted. These optimized performances by additive effects lead to a new approach based on the theoretical calculation toward an improved performance of the perovskite solar cell.
URI
https://scholarworks.unist.ac.kr/handle/201301/25565
URL
https://pubs.acs.org/doi/10.1021/acsaem.8b01364
DOI
10.1021/acsaem.8b01364
ISSN
2574-0962
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ECHE_Journal Papers
SNS_Journal Papers
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