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Title: Nanostructured Electrodes For Organic Bulk Heterojunction Solar Cells: Model Study Using Carbon Nanotube Dispersed Polythiophene-fullerene Blend Devices

Abstract

We test the feasibility of using nanostructured electrodes in organic bulk heterojunction solar cells to improve their photovoltaic performance by enhancing their charge collection efficiency and thereby increasing the optimal active blend layer thickness. As a model system, small concentrations of single wall carbon nanotubes are added to blends of poly(3-hexylthiophene): [6,6]-phenyl-C{sub 61}-butyric acid methyl ester in order to create networks of efficient hole conduction pathways in the device active layer without affecting the light absorption. The nanotube addition leads to a 22% increase in the optimal blend layer thickness from 90 nm to 110 nm, enhancing the short circuit current density and photovoltaic device efficiency by as much as {approx}10%. The associated incident-photon-to-current conversion efficiency for the given thickness also increases by {approx}10% uniformly across the device optical absorption spectrum, corroborating the enhanced charge carrier collection by nanostructured electrodes.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
BROOKHAVEN NATIONAL LABORATORY (BNL)
Sponsoring Org.:
DOE - OFFICE OF SCIENCE
OSTI Identifier:
1033590
Report Number(s):
BNL-93676-2011-JA
Journal ID: ISSN 0021-8979; JAPIAU; R&D Project: NC-001; KC020401H; TRN: US201203%%21
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 110; Journal Issue: 6; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; CARBON; CHARGE CARRIERS; CHARGE COLLECTION; CURRENT DENSITY; EFFICIENCY; ELECTRICAL FAULTS; ELECTRODES; ESTERS; HETEROJUNCTIONS; NANOTUBES; PERFORMANCE; SOLAR CELLS; THICKNESS

Citation Formats

Nam, C.Y., Wu, Q., Su, D., Chiu, C.-y, Tremblay, N.J., Nuckolls, C,, and Black, C.T. Nanostructured Electrodes For Organic Bulk Heterojunction Solar Cells: Model Study Using Carbon Nanotube Dispersed Polythiophene-fullerene Blend Devices. United States: N. p., 2011. Web. doi:10.1063/1.3633236.
Nam, C.Y., Wu, Q., Su, D., Chiu, C.-y, Tremblay, N.J., Nuckolls, C,, & Black, C.T. Nanostructured Electrodes For Organic Bulk Heterojunction Solar Cells: Model Study Using Carbon Nanotube Dispersed Polythiophene-fullerene Blend Devices. United States. doi:10.1063/1.3633236.
Nam, C.Y., Wu, Q., Su, D., Chiu, C.-y, Tremblay, N.J., Nuckolls, C,, and Black, C.T. Mon . "Nanostructured Electrodes For Organic Bulk Heterojunction Solar Cells: Model Study Using Carbon Nanotube Dispersed Polythiophene-fullerene Blend Devices". United States. doi:10.1063/1.3633236.
@article{osti_1033590,
title = {Nanostructured Electrodes For Organic Bulk Heterojunction Solar Cells: Model Study Using Carbon Nanotube Dispersed Polythiophene-fullerene Blend Devices},
author = {Nam, C.Y. and Wu, Q. and Su, D. and Chiu, C.-y and Tremblay, N.J. and Nuckolls, C, and Black, C.T.},
abstractNote = {We test the feasibility of using nanostructured electrodes in organic bulk heterojunction solar cells to improve their photovoltaic performance by enhancing their charge collection efficiency and thereby increasing the optimal active blend layer thickness. As a model system, small concentrations of single wall carbon nanotubes are added to blends of poly(3-hexylthiophene): [6,6]-phenyl-C{sub 61}-butyric acid methyl ester in order to create networks of efficient hole conduction pathways in the device active layer without affecting the light absorption. The nanotube addition leads to a 22% increase in the optimal blend layer thickness from 90 nm to 110 nm, enhancing the short circuit current density and photovoltaic device efficiency by as much as {approx}10%. The associated incident-photon-to-current conversion efficiency for the given thickness also increases by {approx}10% uniformly across the device optical absorption spectrum, corroborating the enhanced charge carrier collection by nanostructured electrodes.},
doi = {10.1063/1.3633236},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 6,
volume = 110,
place = {United States},
year = {2011},
month = {9}
}