Premium
Photo‐generated Carrier Dynamics in the Vicinity of the Donor/Acceptor Interface of Organic Solar Cells
Author(s) -
Ryuzaki Sou,
Onoe Jun
Publication year - 2013
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.11542
Subject(s) - acceptor , organic solar cell , open circuit voltage , interface (matter) , charge carrier , fullerene , irradiation , materials science , short circuit , analytical chemistry (journal) , solar cell , optoelectronics , chemistry , voltage , electrical engineering , physics , condensed matter physics , molecule , organic chemistry , engineering , gibbs isotherm , nuclear physics , composite material , polymer
SUMMARY Change in electronic states before and after photo‐irradiation at a Donor/Acceptor (D/A) interface in organic solar cells consisting of zinc‐porphyrin and fullerene films has been examined using in situ impedance spectroscopy ( IS ), which makes it possible to non‐destructively measure a built‐in potential ( V bi ) of both D and A films at the D/A interface. The accumulation of photo‐generated carriers in the vicinity of the D/A interface was found to increase the V bi of both D [Zn( OEP )] and A [C 60 ] films at the interface. In addition, it was noted that the sum of V bi obtained on photo‐irradiation was in good agreement with the open‐circuit voltage ( V OC ), of which the origin is still unsolved for organic solar cells. Thus, the charge accumulation of photo‐generated carriers in the vicinity of the D/A interface plays a key role in determining V OC . © 2013 Wiley Periodicals, Inc. Electron Comm Jpn, 96(8): 1–8, 2013; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/ecj.11542
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom