Nanoimprinting-induced efficiency enhancement in organic solar cells

Wei Yang Chou, Jay Chang, Chia Te Yen, Fu Ching Tang, Horng Long Cheng, Ming Hua Chang, Steve Lien-Chung Hsu, Jen Sue Chen, Yung Chun Lee

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The performance of bilayer heterojunction, pentacene and perylene tetracarboxylic diimide organic solar cells (OSC) is dramatically enhanced by performing nanoimprinting on the hole transport layer in which poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) nanogratings are built. A standard OSC embeded with PEDOT:PSS gratings enables photocarriers to move toward electrodes. In particular, the visualization of morphologies for these heterojunction layers reveals pillar-like grains that are induced by the geometric effect of PEDOT:PSS gratings. Toghther with analyzing absorption and time-resolved photoluminescence spectra, a consistent correlation between OSC performance, photophysical data, and pillar-like morphology has been obtained for the device with imprinted PEDOT:PSS nanogratings.

Original languageEnglish
Article number183108
JournalApplied Physics Letters
Volume99
Issue number18
DOIs
Publication statusPublished - 2011 Oct 31

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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