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

ChihWei Chu | Zendy; Hoichang Yang | Zendy; Wei-Jen Hou | Zendy; Jingsong Huang | Zendy; Gang Li | Zendy; Yang Yang | Zendy

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

Author(s) -

ChihWei Chu,

Hoichang Yang,

Wei-Jen Hou,

Jingsong Huang,

Gang Li,

Yang Yang

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2891884

Subject(s) - materials science , crystallinity , polymer solar cell , energy conversion efficiency , solar cell , annealing (glass) , nanostructure , chemical engineering , polymer , organic solar cell , nanoscopic scale , optoelectronics , nanotechnology , composite material , engineering

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%.

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