Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (3): 453-459.doi: 10.3866/PKU.WHXB201312274

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

To Improve the Efficiency of Bulk Heterojunction Organic Solar Cells by Incorporating CdSe/ZnS Quantum Dots

NI Ting, ZOU Fan, JIANG Yu-Rong, YANG Sheng-Yi   

  1. Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Optoelectronics and School of Physics, Beijing Institute of Technology, Beijing 100081, P. R. China
  • Received:2013-10-23 Revised:2013-12-26 Published:2014-02-27
  • Contact: YANG Sheng-Yi
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (60777025), Cooperation Project of Beijing Nova Program, China (XXHZ201204), Foundation of Distinguished Young and Middle-aged Teacher at BIT (BIT-JC-201005) and Program from the Key Laboratory of Photoelectronic Imaging Technology and System (2012OEIOF02), Beijing Institute of Technology, Ministry of Education of China.


The efficiency of bulk heterojunction solar cells was enhanced by incorporating CdSe/ZnS core-shell colloidal quantum dots (CQDs) into copolymers of poly(3-hexylthiophene (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as the active layer, as result of the increased absorption in the visible region. The doping of CdSe/ZnS CQDs in the active layer and the influence of CQD surface ligands on device performance were investigated. A maximum power conversion efficiency (PCE) of 3.99% was obtained from the optimized solar cell ITO/PEDOT:PSS/P3HT:PCBM:(CdSe/ZnS)/Al (ITO: indium-tin oxide; PEDOT: poly(3,4-ethylendioxythiophene; PSS: poly(styrenesulfonate)) under AM1.5 illumination. This was 45.1% improvement on the PCE of the control device ITO/PEDOT:PSS/P3HT:PCBM/Al.

Key words: Bulk heterojunction solar cell, CdSe/ZnS core-shell colloidal quantum dot, Polymer, Ligand exchange, Power conversion efficiency