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.
| Original language | English |
|---|---|
| Pages (from-to) | 446-452 |
| Number of pages | 7 |
| Journal | Solar Energy Materials and Solar Cells |
| Volume | 95 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2011 |
Bibliographical note
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.
Keywords
- CdTe/CdSe tetrapod nanocrystals
- Hybrid solar cells
- Oleic acid capped tetrapod nanocrystals
- P3HT
- Type ii heterojunction