阴极
材料科学
光电流
化学工程
多金属氧酸盐
钨
有机太阳能电池
光伏系统
能量转换效率
降级(电信)
聚合物
光电子学
复合材料
化学
有机化学
冶金
催化作用
生态学
物理化学
工程类
生物
电信
计算机科学
作者
Leonidas C. Palilis,Maria Vasilopoulou,Antonios M. Douvas,Dimitra G. Georgiadou,Στέλλα Κέννου,Nikolaos A. Stathopoulos,Vassilios Constantoudis,Panagiotis Argitis
标识
DOI:10.1016/j.solmat.2013.02.034
摘要
We report for the first time the use of a water-soluble, tungsten polyoxometalate H3PW12O40 (PW12-POM) as an efficient cathode interlayer incorporated into poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM-61) polymer solar cells. The short circuit photocurrent density of the PW12-POM modified device is enhanced by ∼40% the open circuit voltage increases from 0.61 V to 0.65 V and the fill factor from 0.36 to 0.41, resulting to a power conversion efficiency enhancement of ∼70% (from 1.57% for the reference to 2.7% for the PW12-POM modified device). The improvement is attributed to enhanced electron transfer/extraction at the PW12-POM/Al interface as a result of the favorable interfacial energy level alignment and possible enhancement of the local electric field due to the nanoscale morphology of the PW12-POM layer, as evidenced by AFM measurements. A reduced degradation rate was measured for PW12-POM modified devices stored in dark and measured in ambient conditions. Taking into account the advantageous solution processability of PW12-POM, the large increase in the device efficiency and the improvement of their stability, we manifest that PW12-POM has highly desirable properties in order to be embedded as cathode interlayer in organic photovoltaic cells.
科研通智能强力驱动
Strongly Powered by AbleSci AI