Highly efficient inverted polymer solar cells with reduced graphene-oxide-zinc-oxide nanocomposites buffer layer

Hyun Woo Lee, Jin Young Oh, Tae Il Lee, Woo Soon Jang, Young Bum Yoo, Soo Sang Chae, Jee Ho Park, Jae Min Myoung, Kie Moon Song, Hong Koo Baik

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Abstract

In this study, we reported a 36 improvement in the performance of inverted solar cells as a result of increased short-circuit current (JSC) obtained using a composition of zinc oxide (ZnO) and reduced graphene oxide (RGO) as an n-type buffer layer. RGO-ZnO nanocomposites show higher electron conductivity than intrinsic ZnO; moreover, they show reduced contact resistance at the interface between the active layer and n-type buffer layer. These factors prevent carrier loss resulting from defects and recombinations in the device, thereby significantly increasing the JSC value for the device. Thus, an efficiency of 4.15 was achieved for inverted solar cells with a controlled RGO-ZnO nanocomposites layer.

Original languageEnglish
Article number193903
JournalApplied Physics Letters
Volume102
Issue number19
DOIs
Publication statusPublished - 2013 May 13

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Woo Lee, H., Young Oh, J., Il Lee, T., Soon Jang, W., Bum Yoo, Y., Sang Chae, S., Ho Park, J., Min Myoung, J., Moon Song, K., & Koo Baik, H. (2013). Highly efficient inverted polymer solar cells with reduced graphene-oxide-zinc-oxide nanocomposites buffer layer. Applied Physics Letters, 102(19), [193903]. https://doi.org/10.1063/1.4804645