Printable, wide band-gap chalcopyrite thin films for power generating window applications

Sung Hwan Moon, Se Jin Park, Yun Jeong Hwang, Doh Kwon Lee, Yunae Cho, Dong Wook Kim, Byoung Koun Min

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


Printable, wide band-gap chalcopyrite compound films (CuInGaS2, CIGS) were synthesized on transparent conducting oxide substrates. The wide band-gap and defective nature of the films reveal semi-transparent and bifacial properties that are beneficial for power generating window applications. Importantly, solar cell devices with these films demonstrate a synergistic effect for bifacial illumination resulting in a 5.4-16.3% increase of the apparent power conversion efficiency compared to the simple sum of the efficiencies of the front and rear side illumination only. We also confirmed that this extra output power acquisition due to bifacial irradiation is apparently not influenced by the light intensity of the rear side illumination, which implies that weak light (e.g., indoor light) can be efficiently utilized to improve the overall solar cell efficiency of bifacial devices.

Original languageEnglish
Article number4408
JournalScientific Reports
StatePublished - 18 Mar 2014

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea Grant (NRF-2009-C1AAA001-0092935 and University-Institute cooperation program) and partly by the ‘‘National Agenda Project’’ program of the Korea Research Council of Fundamental Science & Technology (KRCF), funded by the Ministry of Science, ICT and Future Planning. Also, the authors would like to thank the program of the Korea Institute of Science and Technology (KIST).


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