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研究了一种新型的量子点敏化太阳能电池,通过化学浴沉积法(CBD)将光敏化剂Bi2S3量子点沉淀在TiO2纳米多孔薄膜上。在太阳能模拟器照射下(AM 1.5,100mW*cm-2),研究不同CBD周期下制备的太阳能电池的光电特性。光电流的强度随着CBD周期的增加先增加而后降低,CBD循环5次后,光电流密度为0.84mA cm-2,开路电压为330mV,光电转化效率最高达0.065%。进一步研究表面,在开路环境下,CBD循环次数的增加增强了载流子的复合率并且降低了电子寿命。
A new type of quantum dot sensitized solar cell was studied. The Bi2S3 quantum dots were deposited on TiO2 nanoporous films by chemical bath deposition (CBD). Under solar simulator irradiation (AM 1.5, 100mW * cm-2), the photovoltaic characteristics of solar cells prepared at different CBD cycles were studied. The photocurrent intensity increased first and then decreased with the increase of CBD cycle. After 5 cycles of CBD, the photocurrent density was 0.84 mA cm-2, the open circuit voltage was 330 mV, and the photoelectric conversion efficiency was up to 0.065%. Further study of the surface, in the open circuit environment, the increase in the number of CBD cycles increases the carrier recombination rate and decreases the electron lifetime.