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Title: Exciton Splitting and Carrier Transport Across the Amorphous-Silicon/Polymer Solar Cell Interface

Abstract

The authors study exciton splitting at the interface of bilayer hybrid solar cells to better understand the physics controlling organic-inorganic device performance. Hydrogenated amorphous silicon (a-Si:H)/poly(3-hexylthiophene) (P3HT) and a-Si:H/poly(2-methoxy-5-(2{prime}-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV) solar cells show photoresponse dominated by exciton production in the polymer. The a-Si:H/P3HT devices are nearly as efficient as titania/P3HT cells. However, the a-Si:H/MEH-PPV system has much lower photocurrent than a-Si:H/P3HT, likely due to inefficient hole transfer back to the MEH-PPV after energy transfer from MEH-PPV to a-Si:H.

Authors:
; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
944473
DOE Contract Number:  
AC36-99-GO10337
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 89; Journal Issue: 25, 2006; Related Information: Article No. 252102; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ENERGY TRANSFER; EXCITONS; PERFORMANCE; PHOTOCURRENTS; PHYSICS; PRODUCTION; SILICON; SOLAR CELLS; TRANSPORT; Solar Energy - Photovoltaics; Silicon Materials and Devices

Citation Formats

Gowrishankar, V, Scully, S R, McGehee, M D, Wang, Q, and Branz, H M. Exciton Splitting and Carrier Transport Across the Amorphous-Silicon/Polymer Solar Cell Interface. United States: N. p., 2006. Web. doi:10.1063/1.2408641.
Gowrishankar, V, Scully, S R, McGehee, M D, Wang, Q, & Branz, H M. Exciton Splitting and Carrier Transport Across the Amorphous-Silicon/Polymer Solar Cell Interface. United States. doi:10.1063/1.2408641.
Gowrishankar, V, Scully, S R, McGehee, M D, Wang, Q, and Branz, H M. Sun . "Exciton Splitting and Carrier Transport Across the Amorphous-Silicon/Polymer Solar Cell Interface". United States. doi:10.1063/1.2408641.
@article{osti_944473,
title = {Exciton Splitting and Carrier Transport Across the Amorphous-Silicon/Polymer Solar Cell Interface},
author = {Gowrishankar, V and Scully, S R and McGehee, M D and Wang, Q and Branz, H M},
abstractNote = {The authors study exciton splitting at the interface of bilayer hybrid solar cells to better understand the physics controlling organic-inorganic device performance. Hydrogenated amorphous silicon (a-Si:H)/poly(3-hexylthiophene) (P3HT) and a-Si:H/poly(2-methoxy-5-(2{prime}-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV) solar cells show photoresponse dominated by exciton production in the polymer. The a-Si:H/P3HT devices are nearly as efficient as titania/P3HT cells. However, the a-Si:H/MEH-PPV system has much lower photocurrent than a-Si:H/P3HT, likely due to inefficient hole transfer back to the MEH-PPV after energy transfer from MEH-PPV to a-Si:H.},
doi = {10.1063/1.2408641},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 25, 2006,
volume = 89,
place = {United States},
year = {2006},
month = {1}
}