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Journal of Photonics for Energy • Open Access

Investigation of properties of InGaN-based vertical-type solar cells with emission wavelengths in ultraviolet-blue-green regions
Author(s): Seung Hwan Kim; Jae Phil Shim; Hyun Ho Park; Young Ho Song; Hyung Jo Park; Seong Ran Jeon; Dong Sun Lee; Seung Hyeon Yang; Gye Mo Yang

Paper Abstract

We investigate the properties of InGaN-based vertical-type solar cells having wavelengths ranging from the ultraviolet to green regions. It is well known that InGaN-based solar cells require a high indium composition to obtain high conversion efficiency. However, although InGaN-based solar cells with a high indium composition have been fabricated, their conversion efficiency has not sufficiently increased. Therefore, to further understand carrier transport, we measured the bias-dependent external quantum efficiency. For vertical-type green solar cells with a high indium composition, we confirmed that they have a higher short circuit current than other samples tested due to their broader overlapping region with the solar spectrum, though their fill factor remained low due to their high barrier height and strong piezoelectric field, which caused a reduction in the carrier tunneling rate.

Paper Details

Date Published: 23 April 2014
PDF: 9 pages
J. Photon. Energy. 4(1) 043096 doi: 10.1117/1.JPE.4.043096
Published in: Journal of Photonics for Energy Volume 4, Issue 1
Show Author Affiliations
Seung Hwan Kim, Chonbuk National Univ. (Republic of Korea)
Korea Photonics Technology Institute (Republic of Korea)
Jae Phil Shim, Gwangju Institute of Science and Technology (Korea, Republic of)
Hyun Ho Park, Chonbuk National Univ. (Korea, Republic of)
Young Ho Song, Korea Photonics Technology Institute (Korea, Republic of)
Hyung Jo Park, Korea Photonics Technology Institute (Korea, Republic of)
Seong Ran Jeon, Korea Photonics Technology Institute (Korea, Republic of)
Dong Sun Lee, Gwangju Institute of Science and Technology (Korea, Republic of)
Seung Hyeon Yang, Chonbuk National Univ. (Korea, Republic of)
Gye Mo Yang, Chonbuk National Univ. (Korea, Republic of)


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