Hybrid solar cells based on tetrapod nanocrystals: The effects of compositions and type II heterojunction on hybrid solar cell performance

Title
Hybrid solar cells based on tetrapod nanocrystals: The effects of compositions and type II heterojunction on hybrid solar cell performance
Authors
이현주김성원정원석김경곤김동환
Keywords
폴리머 태양전지; 양자점 태양전지; Oleic acidcappedtetrapodnanocrystals; Hybrid solarcells; Type IIheterojunction; P3HT; CdTe/CdSe tetrapodnanocrystals
Issue Date
2011-02
Publisher
Solar energy materials and solar cells
Citation
VOL 95, NO 2, 446-452
Abstract
We synthesized oleic acid capped tetrapod nanocrystals of CdSe, CdTe and type II heterostructured CdTe/CdSe to investigate the effects of nanocrystal compositions and type II heterojunction on the photovoltaic properties of hybrid solar cells. The hybrid solar cell based on the blend of CdSe tetrapod nanocrystals and P3HT with a weight ratio of 6:1 showed the maximum power conversion efficiency of 1.03% under AM 1.5 G condition, and the maximum incident photon to current conversion efficiency of the solar cell was 43% at 415 nm. Although CdTe and CdTe/CdSe tetrapod nanocrystals showed relatively poor performance, the power conversion efficiency and the short circuit current density of the hybrid solar cell based on type II heterostructured CdTe/CdSe tetrapod nanocrystals was 4.4 and 3.9 times higher than that of the solar cell based on CdTe tetrapod nanocrystals, respectively. These results can be explained by the effects of nanocrystal compositions and type II heterojunction on the photovoltaic properties of hybrid solar cells.
URI
http://pubs.kist.re.kr/handle/201004/39432
ISSN
0927-0248
Appears in Collections:
KIST Publication > Article
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