Interface Recombination in Depleted Heterojunction Photovoltaics based on Colloidal Quantum Dots

Autor:	André J. Labelle, Edward H. Sargent, Kyle W. Kemp, Alexander H. Ip, Sjoerd Hoogland, Illan J. Kramer, Susanna M. Thon
Rok vydání:	2013
Předmět:	Photocurrent Materials science Renewable Energy Sustainability and the Environment Open-circuit voltage business.industry Heterojunction Atomic layer deposition Quantum dot Photovoltaics Optoelectronics General Materials Science business Layer (electronics) Recombination
Zdroj:	Advanced Energy Materials. 3:917-922
ISSN:	1614-6832
DOI:	10.1002/aenm.201201083
Popis:	Interface recombination was studied in colloidal quantum dot photovoltaics. Optimization of the TiO2-PbS interface culminated in the introduction of a thin ZnO buffer layer deposited with atomic layer deposition. Transient photovoltage measurements indicated a nearly two-fold decrease in the recombination rate around 1 sun operating conditions. Improvement to the recombination rate led to a device architecture with superior open circuit voltage (VOC) and photocurrent extraction. Overall a 10% improvement in device efficiency was achieved with Voc enhancements up to 50 mV being realized.
Databáze:	OpenAIRE
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