Journal
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 10-11
Volume 9, Issue 10-11, Pages 2134-2137Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssc.201200132
Keywords
chemical mist deposition; graphene oxide; PEDOT:PSS; c-Si/organic junction solar cells
Funding
- Grants-in-Aid for Scientific Research [22560002] Funding Source: KAKEN
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The chemical mist deposition of graphene oxide (GO) and poly(3,4-ethylenedioxythiophene): poly(stylene-sulfonate) (PEDOT:PSS) were investigated on the crystalline silicon (c-Si) substrate for the n-type c-Si/organic heterojunction solar cells. The uniform coating of GO flake with an average size of 1-5 mu m was obtained on the hydrophobic c-Si wafer using deionized water as a solvent. The GO layer thickness could be controlled from a monolayer to a few tens of nanometres by varying mist deposition time. The c-Si/GO/PEDOT:PSS heterojunction solar cells shows the efficiency improved from 8.75 to 9.27% with insertion of GO flakes a the PEDOT:PSS and c-Si interface owing to the enhanced suppression of electron recombination and/or promotion of hole current at the anode. Furthermore, the CMD was also applied to coat conductive PEDOT: PSS films on the textured c-Si. The. of 7.75% was obtained with a short-circuit current of 34.22 mA/cm(2), a open-circuit voltage of 0.46 V, and a fill factor of 0.48. These findings imply that CMD is a promising method for the uniform deposition of both nanomaterials (GO) and conjugated polymer for the c-Si/organic heterojunction solar cells. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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