Nanoimprinting-induced efficiency enhancement in organic solar cells

作者：Chou Wei Yang^*; Chang Jay; Yen Chia Te; Tang Fu Ching; Cheng Horng Long; Chang Ming Hua; Hsu Steve Lien Chung; Chen Jen Sue; Lee Yung Chun

来源：Applied Physics Letters, 2011, 99(18): 183108.

DOI：10.1063/1.3659471

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.

• 出版日期2011-10-31