MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, PR China.
ACS Nano. 2011 Dec 27;5(12):9494-500. doi: 10.1021/nn203375g. Epub 2011 Nov 2.
An in situ electrodeposition method is described to fabricate the CdS or/and CdSe quantum dot (QD) sensitized hierarchical TiO(2) sphere (HTS) electrodes for solar cell application. Intensity modulated photocurrent spectroscopy (IMPS), intensity modulated photovoltage spectroscopy (IMVS) and electrochemical impedance spectroscopy (EIS) measurements are performed to investigate the electron transport and recombination of quantum dot-sensitized solar cells (QDSSCs) based on HTS/CdS, HTS/CdSe, and HTS/CdS/CdSe photoelectrodes. This dynamic study reveals that the CdSe/CdS cosensitized solar cell performs ultrafast electron transport and high electron collection efficiency (98%). As a consequence, a power conversion efficiency as high as 4.81% (J(SC) = 18.23 mA cm(-2), V(OC) = 489 mV, FF = 0.54) for HTS/CdS/CdSe photoelectrode based QDSSC is observed under one sun AM 1.5 G illumination (100 mW cm(-2)).
本文描述了一种原位电沉积法来制备 CdS 或/和 CdSe 量子点（QD）敏化的分级 TiO2 球（HTS）电极，用于太阳能电池应用。强度调制光电流谱（IMPS）、强度调制光电压谱（IMVS）和电化学阻抗谱（EIS）测量用于研究基于 HTS/CdS、HTS/CdSe 和 HTS/CdS/CdSe 光电电极的量子点敏化太阳能电池（QDSSC）的电子输运和复合。这项动态研究表明，CdSe/CdS 共敏化太阳能电池具有超快的电子输运和高电子收集效率（98%）。因此，在模拟太阳光 AM1.5G 照射（100 mW/cm²）下，基于 HTS/CdS/CdSe 光电电极的 QDSSC 的功率转换效率高达 4.81%（JSC=18.23 mA/cm²，VOC=489 mV，FF=0.54）。
