Organic-silicon heterojunction solar cells: Open-circuit voltage potential and stability

Autor:	Valeriya Titova, Dimitri Zielke, Jan Schmidt
Rok vydání:	2013
Předmět:	Materials science Physics and Astronomy (miscellaneous) PEDOT:PSS business.industry Open-circuit voltage Energy conversion efficiency Optoelectronics Heterojunction Carrier lifetime Crystalline silicon Hybrid solar cell business Polymer solar cell
Zdroj:	Applied Physics Letters. 103:183901
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.4827303
Popis:	We characterize the electronic properties of crystalline silicon (c-Si)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) junctions by means of contactless carrier lifetime measurements. The measurements demonstrate that this type of heterojunction has an unexpectedly high open-circuit voltage (Voc) potential exceeding 690 mV, making it relevant for the implementation into high-efficiency c-Si solar cells. Hybrid n-type c-Si solar cells featuring a PEDOT:PSS hole-transport layer on the front reach an energy conversion efficiency of 12.3%. We observe a humidity-related degradation in cell efficiency during storage in air. The degradation is reduced by capping the entire device by an atomic-layer-deposited aluminum oxide film and is completely avoided in a dehumidified environment.
Databáze:	OpenAIRE
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