Energy transfer processes in new conjugated polymer/6,6-phenyl-C 61-butyric acid methyl ester systems for photovoltaic applications

Zhiling Zhang, Yu Xie, Qiquan Qiao, Michael Ropp, David Galipeau, Xingzhong Yan

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

Abstract

The photoinduced energy transfer dynamics in poly[9,9-di-(2-ethylhexyl)- fluorenyl-2,7-diyl]/6,6-phenyl-C61-butyric acid methyl ester (PDFA/PCBM) and poly(9,9-dioctylfluorenyl-2,7-diyl) (PF)/PCBM systems have been investigated. Ultrafast intra-chain energy transfer on the time-scale of a few hundred femtoseconds was found. A decay process that occurs in the picosecond time-scale may indicate an energy transfer process from the polymer to PCBM. This may be associated with a torsional relaxation (in the case of PF) or vibrational relaxation (in the case of PDFA). Bulk heterojunction solar cells have been fabricated using the polymer/PCBM systems. The cell made from PDFA/PCBM blend demonstrated a 30% higher conversion efficiency than the cell made from PF/PCBM blend, consistent with their absorption profiles.

Original languageEnglish (US)
Title of host publication2009 34th IEEE Photovoltaic Specialists Conference, PVSC 2009
Pages361-365
Number of pages5
DOIs
StatePublished - 2009
Externally publishedYes
Event2009 34th IEEE Photovoltaic Specialists Conference, PVSC 2009 - Philadelphia, PA, United States
Duration: Jun 7 2009Jun 12 2009

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Conference

Conference2009 34th IEEE Photovoltaic Specialists Conference, PVSC 2009
CountryUnited States
CityPhiladelphia, PA
Period6/7/096/12/09

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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