Incorporation of potassium at CuPc/ C60 interface for photovoltaic application

Chuan Feng Shih, Kuang Teng Hung, Hui Ju Chen, Chu Yun Hsiao, Kuan Ta Huang, Szu Hung Chen

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


This letter demonstrates the effect of potassium (K) doping at the donor-acceptor interface of CuPc/ C60 -based organic solar cells. Power conversion efficient (PCE) doubled when a little K was doped into the CuPc/ C60 interface and the device was postannealed (75 °C, 10 min). Changes in binding energies, depletion capacitance, and mobilities of electrons and holes were investigated. The marked improvement of PCE arose mostly from the increase in short-circuit current, owing to the modified charge transfer process.

Original languageEnglish
Article number113307
JournalApplied Physics Letters
Issue number11
Publication statusPublished - 2011 Mar 14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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