Citation

BibTex format

@article{Buchaca-Domingo:2015:10.1021/ja512410f,
author = {Buchaca-Domingo, E and Vandewal, K and Fei, Z and Watkins, SE and Scholes, FH and Bannock, JH and de, Mello JC and Richter, LJ and DeLongchamp, DM and Amassian, A and Heeney, M and Salleo, A and Stingelin, N},
doi = {10.1021/ja512410f},
journal = {Journal of the American Chemical Society},
pages = {5256--5259},
title = {Direct correlation of charge transfer absorption with molecular donor: acceptor interfacial area via photothermal deflection spectroscopy},
url = {http://dx.doi.org/10.1021/ja512410f},
volume = {137},
year = {2015}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Here we show that the charge transfer (CT) absorption signal in bulk-heterojunction solar cell blends, measured by photothermal deflection spectroscopy, is directly proportional to the density of molecular donor:acceptor interfaces. Since the optical transitions from the ground state to the interfacial CT state are weakly allowed at photon energies below the optical gap of both the donor and acceptor, we can exploit the use of this sensitive linear absorption spectroscopy for such quantification. Moreover, we determine the absolute molar extinction coefficient of the CT transition for an archetypical polymer:fullerene interface. The latter is ∼100 times lower than the extinction coefficient of the donor chromophore involved, allowing us to experimentally estimate the transition dipole moment as 0.3 D and the electronic coupling between the ground and CT states to be on the order of 30 meV.
AU - Buchaca-Domingo,E
AU - Vandewal,K
AU - Fei,Z
AU - Watkins,SE
AU - Scholes,FH
AU - Bannock,JH
AU - de,Mello JC
AU - Richter,LJ
AU - DeLongchamp,DM
AU - Amassian,A
AU - Heeney,M
AU - Salleo,A
AU - Stingelin,N
DO - 10.1021/ja512410f
EP - 5259
PY - 2015///
SN - 0002-7863
SP - 5256
TI - Direct correlation of charge transfer absorption with molecular donor: acceptor interfacial area via photothermal deflection spectroscopy
T2 - Journal of the American Chemical Society
UR - http://dx.doi.org/10.1021/ja512410f
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000353931500004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - https://pubs.acs.org/doi/10.1021/ja512410f
VL - 137
ER -