TY - JOUR
T1 - Hybrid solar cells based on tetrapod nanocrystals
T2 - The effects of compositions and type II heterojunction on hybrid solar cell performance
AU - Lee, Hyunju
AU - Kim, Sungwon
AU - Chung, Won Suk
AU - Kim, Kyungkon
AU - Kim, Donghwan
N1 - Funding Information:
The authors acknowledge the financial support from the Pioneer Research Program of the Korea Science and Engineering Foundation (KOSEF) under contract No. 2008-05103 . This work was also supported in part by the Brain Korea 21 project and a Korea University Grant . We thank the staff of Korea Basic Science Institute (KBSI, Seoul) and Korea Advanced Nano Fab Center (KANC, Suwon) for their assistance in performing TEM analysis.
PY - 2011/2
Y1 - 2011/2
N2 - 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.
AB - 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.
KW - CdTe/CdSe tetrapod nanocrystals
KW - Hybrid solar cells
KW - Oleic acid capped tetrapod nanocrystals
KW - P3HT
KW - Type ii heterojunction
UR - http://www.scopus.com/inward/record.url?scp=84860745292&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2010.08.029
DO - 10.1016/j.solmat.2010.08.029
M3 - Article
AN - SCOPUS:84860745292
SN - 0927-0248
VL - 95
SP - 446
EP - 452
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
IS - 2
ER -