组合式退火方式提高有机太阳电池效率的研究

Study on Improving the Efficiency of Organic Solar Cells by Combined Annealing

制备了结构为：ITO/PEDOT：PSS/P3HT＋PCBM/Li F/Al的有机太阳能电池,研究了退火工艺对电池性能的影响。实验发现：1器件退火时间选取50 min时,退火温度在140~160℃区间内性能高于其它温度段,短路电流密度最高达6.57 m A/cm2、能量转换效率最高达2.12%。2退火温度选取150℃时,退火时间在40~60 min内性能高于其他时间段,短路电流密度最高达6.608 m A/cm2,能量转换效率最高达2.13%。3由12的最优温度、时间段组合得出的退火方式,短路电流密度最高达7.22 m A/cm2,能量转换效率最高达2.33%,组合退火方式使器件性能更高。

Organic solar cells with the structure of ITO/PEDOT： PSS/P3HT＋PCBM/Li F/Al were prepared and the device performances under different annealing conditions were studied. The result showed that 1 the devices performed better when annealing after 50 minutes in the temperature range of 140-160 ℃ than those in other annealing temperature range. The optimal device showed a short circuit current density and energy conversion efficiency was 6.57 m A/cm2 and 2.12% respectively; 2 when 150 ℃ annealing temperature was chosen, the devices showed a better performance from 40 to 60 minutes than those in other annealing time. The top short circuit current density and energy conversion efficiency reached 6.608 m A/cm2 and 2.13% respectively; 3 when the optimal annealing time and temperature were adopted based on 1 and 2, the short circuit current density and energy conversion efficiency of the optimal device were obviously improved to 7.22 m A/cm2 and 2.33% respectively. Annealing under combination conditions was an effective approach to device optimization.