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 E-mail:syyang@bit.edu.cn
  • 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.

Abstract:

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

MSC2000: 

  • O649