电纺AZO NWs电子传输层提高钙钛矿太阳电池性能的研究

研究通过静电纺丝技术制备不同掺铝比例的氧化锌纳米线(AZO NWs),并将其作为电子传输层来提高钙钛矿太阳电池效率。首先使用静电纺丝和煅烧工艺制备出表面光滑连续、形貌均匀、长径比达～10~5的AZO NWs,然后将AZO NWs作为电子传输层应用于钙钛矿太阳电池。与单层SnO₂电子传输层的电池相比,加入AZO NWs后可有效提高电池的短路电流(J_sc)和填充因子(FF)。实验发现,掺Al为2%(摩尔分数)时得到的器件最优效率(PCE)可达到18.41%,比单层SnO₂电子传输层器件提高了13.21%。器件性能提高的主要原因是掺Al后增加了传输层的电子浓度,同时纳米线增加了电子传输层与活性层的接触界面,提高了导电性和传输能力。

STUDY ON PERFORMANCE ENHANCEMENT OF PEROVSKITE SOLAR CELLS VIA ELECTROSPUN AZO NWs AS ELECTRONIC TRANSPORT LAYER

Aluminum-doped zinc oxide nanowires(AZO NWs)were prepared by electrospinning technique,which were used as electron transport layers to improve the efficiency of perovskite solar cells(PSCs).First,AZO NWs with good uniformity,smooth continuous morphology and large aspect ratio of 10⁵were prepared by electrospinning technique and calcination process.Then,AZO NWs were applied to PSCs successfully.The short circuit current density(J_sc)and filler factor(FF)of the PSCs are increased by AZO NWs.When Al doping mol ratio is 2%,the optimal PCE can reach 18.41%,which is 13.21%improvement compared to that of the single SnO₂layer device.The performance enhancement can be ascribed to the increase of the electron concentration by Aluminumdoping,and the larger interface area of the SnO₂/perovskite layer that arises from the nanostructure.