【作者】 潘凯； 刘兆阅； 张清林； 王德军； 白玉白； 李铁津；

【机构】 吉林大学化学学院；

【摘要】 制备了汞溴红敏化的ZnO/SnO₂复合光电化学池。在最佳混合比例下,ZnO/SnO₂复合光电池在30W/m² 522nm单色光的照射下得到0.892mA/cm²的短路光电流(I_sc)和0.411V的开路光电压(V_oc),从而得到4.64%的光电转换效率（η）。与ZnO和SnO₂光电池相比,复合光电池的I_sc均提高,而V_oc小于ZnO电池的V_oc。光电压谱表明,在复合光电池中,ZnO可能包覆SnO₂粒子,染料主要吸附在ZnO粒子上,ZnO和SnO₂之间的能量势垒是短路光电流增大的原因。暗电流的测试表明,ZnO加入到SnO₂能有效抑制复合电池的暗电流。更多还原

【Abstract】 Mercurochrome-sensitized composite ZnO/SnO2 solar cells have been fabricated. The composite cell with optimal mixed ratio of ZnO to SnO2 generated a short-circuit photocurrent (Isc) of 0. 892mA/cm2, an open-circuit photovoltage (Voc) of 0. 411V, and corresponding to the conversion efficiency of 4. 64% under irradiation of 30W/m2 522nm monochromatic light obtained by optical filter. Comparing with ZnO and SnO2 cells, the Isc of the composite cell was both improved, but the Voc was less than that of the ZnO cell. The photovoltage spectra indicated that ZnO may coat the SnO2 particles in the composite cell and the dye was mainly adsorbed by ZnO. The energy barriers between ZnO and SnO2 contributed to the improvement of the short-circuit photocurrent. The measurements of the dark-current showed that the dark-current of the composite cell was effectively suppressed when ZnO was added to SnO2.更多还原