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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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Enhancement of sub-bandgap light absorption in perovskite semiconductor films via critical coupling

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Title
Enhancement of sub-bandgap light absorption in perovskite semiconductor films via critical coupling
Author
Woo, Byung HoonSeo, In CheolHeo, JungwooYoon, Yung JinKim, Jin YoungJun, Young Chul
Issue Date
2019-09
Publisher
Optical Society of America
Citation
OPTICS EXPRESS, v.27, no.18, pp.25293 - 25304
Abstract
Light absorption in semiconductors is a fundamental problem that has broad impact on a wide range of fields. However, it is intrinsically limited by the bandgap energy of the semiconductor. Herein, we study the enhancement of sub-bandgap light absorption in inorganic-organic hybrid perovskite semiconductor films via critical coupling. This is achieved at large incidence angles by balancing radiative and nonradiative decay rates in a planar multilayer structure. We found that a very small loss in the semiconductor layer can result in substantial light absorption. This simple but general method can be used to enhance the optical and optoelectronic responses of semiconductors below the bandgap energy.
URI
https://scholarworks.unist.ac.kr/handle/201301/27514
URL
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-27-18-25293
DOI
10.1364/OE.27.025293
ISSN
1094-4087
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ECHE_Journal Papers
MSE_Journal Papers
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