碳酸铯阴极缓冲层对有机太阳电池器件性能的影响

Influence of Cs_2CO_3 Cathode Buffer Layer on the Performance of Organic Solar Cells Device

以poly(3-hexylthiophene)(P3HT)作为电池给体材料,[6,6]-phenyl-C60-butyric acid methyl ester(PC61BM)为电池受体材料,使用Cs2CO3作为电池的阴极修饰层,通过测量不同条件下制备的器件的J-V曲线和转换效率,研究了Cs2CO3的厚度以及退火温度对电池器件性能的影响。结果表明在2000 r/min转速下旋涂Cs2CO3并在130℃温度下进行退火10 min,电池的短路电流、填充因子、转换效率分别提高到11.56 m A/cm2、58.28%、3.37%,与未处理的器件相比效率提高了16%,而且使用碳酸铯作为阴极缓冲层可以有效的提高电池的稳定性,延长器件的寿命。

Cs2CO3was used to cathode buffer layer materials in organic solar cells based on poly（ 3-hexylthiophene）（ P3HT） /[6,6]-phenyl-C60-butyric acid methyl ester（ PC61BM） active layers,and the influences of thickness and annealing temperature of cathode modification layer on performance of solar cells were investigated by measuring the J-V curves of the samples. The results show that when device’s cathode modification layer were spin-casted at 2000 r / min and annealed at 130 ℃ for 10 min,the short circuit current（ Jsc） and fill factor（ FF） of it increased to 11. 56 m A/cm2,58. 28% respectively. As a result,power conversion efficiency PCE could reach 3. 37%,which was an improvement of more than16% compared to the standard cell. Meanwhile,the stability and lifetime of cell using Cs2CO3 as cathode buffer layer were generally improved.