Citation: YUE Zhao, ZHANG Wei, WANG Cheng, LIU Guo-Hua, NIU Wen-Cheng. Photoinduced Electron Transfer between CdS Quantum Dots and ld Electrodes[J]. Acta Physico-Chimica Sinica, ;2011, 27(12): 2814-2820. doi: 10.3866/PKU.WHXB20112814 shu

Photoinduced Electron Transfer between CdS Quantum Dots and ld Electrodes

1.
Department of Electronics, Nankai University, Tianjin 300071, P. R. China

Received Date: 12 August 2011
Available Online: 20 October 2011
Fund Project: 国家自然科学基金(61001056, 60871028) (61001056, 60871028)天津市自然科学基金(10JCZDJC15300)资助项目 (10JCZDJC15300)

For a better design of quantum dots (QDs) based photoelectrochemical sensors, photoinduced electron transfer between CdS QDs and ld electrodes was studied. First, a theoretical study and mathematical model are given wherein several electron tunneling processes compete with each other to give a photocurrent under illumination. Second, simulations with different parameters were carried out. Finally, photocurrents from CdS QDs modified ld electrodes with dithiol groups were measured under different conditions. The results show that the amplitudes and directions of the photocurrents are affected by the applied potential, the light intensity, and the concentrations of oxidants and reducers. The experimental results were then compared with the simulation results and analyzed based on the model given. By comparing the simulation and experimental results the theoretical study and the mathematical model are shown to be accurate.
- Quantum dot,
- Electron tunneling,
- Photoinduced electron transfer,
- Photocurrent,
- Photoelectrochemistry
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