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Title: Multichromophoric energy sensitization of C{sub 60} for organic photovoltaics

Abstract

In organic photovoltaics (OPVs), photocurrent generation is limited by absorption and exciton diffusion in the active layer. In this work, we describe the energy sensitization of C{sub 60} simultaneously by two chromophores at high volume concentrations (50%). This sensitization strategy takes advantage of the intense absorption of the sensitizers and the exceptional electron conduction and exciton diffusion length of C{sub 60} resulting in a 30% increase in photoresponse of the C{sub 60}-based sensitized acceptor layer between λ = 450 nm and 670 nm and power conversion efficiency under simulated AM 1.5 G illumination. In (2,4-bis[4-(N,N-diphenylamino)-2,6-dihydroxyphenyl] squaraine)/C{sub 60} devices, sensitization results in an increase in J{sub SC} from 6.5 ± 0.2 mA/cm{sup 2} to 8.6 ± 0.2 mA/cm{sup 2} without compromising V{sub OC} or FF. These results demonstrate the robust nature of this sensitization scheme and its broad potential for application in OPVs.

Authors:
 [1]; ;  [2]
  1. Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089 (United States)
  2. Department of Chemistry, University of Southern California, Los Angeles, California 90089 (United States)
Publication Date:
OSTI Identifier:
22303534
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; COLOR; CONCENTRATION RATIO; DIFFUSION; DIFFUSION LENGTH; EFFICIENCY; ELECTRIC CONDUCTIVITY; ELECTRON MOBILITY; ELECTRONS; EQUIPMENT; EXCITONS; FULLERENES; ILLUMINANCE; LAYERS; PHOTOVOLTAIC EFFECT; SENSITIZERS; SIMULATION

Citation Formats

Bartynski, Andrew N., Trinh, Cong, Kirlikovali, Kent O., Thompson, Mark E., E-mail: met@usc.edu, and Department of Chemistry, University of Southern California, Los Angeles, California 90089. Multichromophoric energy sensitization of C{sub 60} for organic photovoltaics. United States: N. p., 2014. Web. doi:10.1063/1.4896502.
Bartynski, Andrew N., Trinh, Cong, Kirlikovali, Kent O., Thompson, Mark E., E-mail: met@usc.edu, & Department of Chemistry, University of Southern California, Los Angeles, California 90089. Multichromophoric energy sensitization of C{sub 60} for organic photovoltaics. United States. https://doi.org/10.1063/1.4896502
Bartynski, Andrew N., Trinh, Cong, Kirlikovali, Kent O., Thompson, Mark E., E-mail: met@usc.edu, and Department of Chemistry, University of Southern California, Los Angeles, California 90089. 2014. "Multichromophoric energy sensitization of C{sub 60} for organic photovoltaics". United States. https://doi.org/10.1063/1.4896502.
@article{osti_22303534,
title = {Multichromophoric energy sensitization of C{sub 60} for organic photovoltaics},
author = {Bartynski, Andrew N. and Trinh, Cong and Kirlikovali, Kent O. and Thompson, Mark E., E-mail: met@usc.edu and Department of Chemistry, University of Southern California, Los Angeles, California 90089},
abstractNote = {In organic photovoltaics (OPVs), photocurrent generation is limited by absorption and exciton diffusion in the active layer. In this work, we describe the energy sensitization of C{sub 60} simultaneously by two chromophores at high volume concentrations (50%). This sensitization strategy takes advantage of the intense absorption of the sensitizers and the exceptional electron conduction and exciton diffusion length of C{sub 60} resulting in a 30% increase in photoresponse of the C{sub 60}-based sensitized acceptor layer between λ = 450 nm and 670 nm and power conversion efficiency under simulated AM 1.5 G illumination. In (2,4-bis[4-(N,N-diphenylamino)-2,6-dihydroxyphenyl] squaraine)/C{sub 60} devices, sensitization results in an increase in J{sub SC} from 6.5 ± 0.2 mA/cm{sup 2} to 8.6 ± 0.2 mA/cm{sup 2} without compromising V{sub OC} or FF. These results demonstrate the robust nature of this sensitization scheme and its broad potential for application in OPVs.},
doi = {10.1063/1.4896502},
url = {https://www.osti.gov/biblio/22303534}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 11,
volume = 105,
place = {United States},
year = {Mon Sep 15 00:00:00 EDT 2014},
month = {Mon Sep 15 00:00:00 EDT 2014}
}