Atomic-scale interfacial band mapping across vertically phased-separated polymer/fullerene hybrid solar cells

Min Chuan Shih, Bo Chao Huang, Chih Cheng Lin, Shao Sian Li, Hsin An Chen, Ya Ping Chiu, Chun Wei Chen

研究成果: 雜誌貢獻文章同行評審

52 引文 斯高帕斯(Scopus)


Using cross-sectional scanning tunneling microscope (XSTM) with samples cleaved in situ in an ultrahigh vacuum chamber, this study demonstrates the direct visualization of high-resolution interfacial band mapping images across the film thickness in an optimized bulk heterojunction polymer solar cell consisting of nanoscale phase segregated blends of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM). We were able to achieve the direct observation of the interfacial band alignments at the donor (P3HT)-acceptor (PCBM) interfaces and at the interfaces between the photoactive P3HT:PCBM blends and the poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) anode modification layer with an atomic-scale spatial resolution. The unique advantage of using XSTM to characterize polymer/fullerene bulk heterojunction solar cells allows us to explore simultaneously the quantitative link between the vertical morphologies and their corresponding local electronic properties. This provides an atomic insight of interfacial band alignments between the two opposite electrodes, which will be crucial for improving the efficiencies of the charge generation, transport, and collection and the corresponding device performance of polymer solar cells.
頁(從 - 到)2387-2392
期刊Nano Letters
出版狀態已發佈 - 6月 12 2013

ASJC Scopus subject areas

  • 生物工程
  • 一般化學
  • 一般材料科學
  • 凝聚態物理學
  • 機械工業


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