Suppressing series resistance in organic solar cells by oxygen plasma treatment

Chien Hung Lin, Shao Chin Tseng, Yuan Kui Liu, Yian Tai, Surojit Chattopadhyay, Chi Feng Lin, Jiun Haw Lee, Jih Shang Hwang, Yung Yu Hsu, Li Chyong Chen*, Wei Chao Chen, Kuei Hsien Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We demonstrate a low series resistance contact of gold (anode)/zinc- phthalocyznine in a reverse organic photovoltaic device aided by oxygen plasma treatment. The power conversion efficiency appreciated from 0.2% to 2.13%, post O2 plasma treatment, predominantly due to the reduction in the series resistance of the device. A depth profile of zinc from x-ray photoelectron spectroscopy study revealed a gold layer with graded zinc composition, instead of pure gold, to be an efficient hole-collector from the organic interface. The zinc alloying of the gold layer has clearly been promoted by the oxygen plasma treatment.

Original languageEnglish
Article number233302
JournalApplied Physics Letters
Issue number23
StatePublished - 2008


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