Microstructural modification of polycarbazole-based polymeric solar cells by thermal annealing

Fu Chiao Wu, Tsai Bau Wu, Horng Long Cheng, Wei Yang Chou, Fu Ching Tang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Blended thin films were thermal-annealed at various temperatures (T A) to serve as active layers in polymeric solar cells. The films were composed of poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′, 7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and [6,6]-phenyl-C71-butyric acid methyl ester and their microstructural features were examined through joint spectroscopy and microscopy. After they were thermal-annealed at a TA below but close to the glass transition temperature of PCDTBT, their various properties improved, including absorbance, molecular ordering, coherence length of PCDTBT, homogeneity of PCDTBT chain conformations, and two-phase pathways. Efficient charge transport and suppressed charge recombination occurred in the modified thin films, resulting in an enhancement of the power conversion efficiency of the corresponding devices.

Original languageEnglish
Title of host publicationProceedings of AM-FPD 2014 - The 21st International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publicationTFT Technologies and FPD Materials
PublisherIEEE Computer Society
Pages249-252
Number of pages4
ISBN (Print)9784863483958
DOIs
Publication statusPublished - 2014 Jan 1
Event21st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2014 - Kyoto, Japan
Duration: 2014 Jul 22014 Jul 4

Publication series

NameProceedings of AM-FPD 2014 - The 21st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials

Other

Other21st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2014
CountryJapan
CityKyoto
Period14-07-0214-07-04

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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    Wu, F. C., Wu, T. B., Cheng, H. L., Chou, W. Y., & Tang, F. C. (2014). Microstructural modification of polycarbazole-based polymeric solar cells by thermal annealing. In Proceedings of AM-FPD 2014 - The 21st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials (pp. 249-252). [6867183] (Proceedings of AM-FPD 2014 - The 21st International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials). IEEE Computer Society. https://doi.org/10.1109/AM-FPD.2014.6867183