Control of the nanoscale crystallinity and phase separation in polymer solar cells

Chih Wei Chu, Hoichang Yang, Wei Jen Hou, Jinsong Huang, Gang Li, Yang Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

189 Citations (Scopus)


Grazing-incidence x-ray diffraction and atomic force microscopy were performed on bulk heterojunction regioregular poly(3-hexylthiophene) (RR-P3HT) [6,6]-phenyl- C71 -butyric acid methyl esters spin-cast films with different film processing conditions to correlate the crystalline nanostructure of P3HT with the corresponding solar cell performance. The increase in long wavelength absorption for solvent annealed films is related to highly conjugated crystal structure of RR-P3HT phase-separated in the active layer. Upon thermal annealing, the solvent annealed 50-nm -thick device shows high solar cell performance with fill factor up to 73% and power conversion efficiency of 3.80%.
Original languageEnglish
Article number103306
JournalApplied Physics Letters
Issue number10
Publication statusPublished - 24 Mar 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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