Dependence of nanocrystal dimensionality on the polymer nanomorphology, anisotropic optical absorption, and carrier transport in P3HT: TiO2 bulk heterojunctions

Chih Cheng Lin, Po Hsun Ho, Chi Liang Huang, Chao Hung Du, Chen Chieh Yu, Hsuen Li Chen, Yun Chieh Yeh, Shao Sian Li, Cheng Kuang Lee, Chun Wei Pao, Ching Pin Chang, Ming Wen Chu, Chun Wei Chen

研究成果: 雜誌貢獻文章同行評審

10 引文 斯高帕斯(Scopus)

摘要

It is known that the nanoscale morphological organization of donors or acceptors in bulk heterojunction (BHJ) solar cells is critical to device performance and strongly affects carrier generation, transporting, and collection. This work demonstrates the dependence of nanocrystal dimensionality and organization on the polymer nanomorphology in P3HT:TiO2 hybrid bulk heterojunctions, which were revealed using grazing-incidence X-ray diffraction (GIXRD) using a synchrotron X-ray beam and electron tomography. We further performed a multiscale molecular dynamic simulation to understand the morphological orientation of a polymer blended with TiO2 nanoparticles (NPs) or nanorods (NRs). The correlation between polymer nanoscale morphology and the dimensionality and anisotropy of nanocrystals in P3HT:TiO2 hybrids clearly explains the observation of different optical absorption and carrier transport behaviors in directions perpendicular or parallel to the film substrate. Our results provide crucial information toward understanding the interplay between nanocrystal dimensionality and polymer morphology in developing organic/inorganic hybrid electronic devices such as thin film transistors (TFTs) or photovoltaics (PVs).
原文英語
頁(從 - 到)25081-25088
頁數8
期刊Journal of Physical Chemistry C
116
發行號47
DOIs
出版狀態已發佈 - 11月 29 2012
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 能源(全部)
  • 物理與理論化學
  • 表面、塗料和薄膜

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