Efficient Carbon-Based CsPbBr3 Inorganic Perovskite Solar Cells by Using Cu-Phthalocyanine as Hole Transport Material

Nano-Micro Letters

Guanglan Liao¹  Zhiyong Liu¹  Bo Sun¹  Xingyue Liu¹  Tielin Shi¹  Jinghui Han¹  Haibo Ye¹  Zirong Tang¹ 

[1] State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology;

关键词: Perovskite solar cells (PSCs);    Metal halide;    CsPbBr3;    Cu-phthalocyanine (CuPc);    Carbon electrode;   

DOI  :  10.1007/s40820-018-0187-3

来源: DOAJ

【 摘 要 】

Abstract Metal halide perovskite solar cells (PSCs) have attracted extensive research interest for next-generation solution-processed photovoltaic devices because of their high solar-to-electric power conversion efficiency (PCE) and low fabrication cost. Although the world’s best PSC successfully achieves a considerable PCE of over 20% within a very limited timeframe after intensive efforts, the stability, high cost, and up-scaling of PSCs still remain issues. Recently, inorganic perovskite material, CsPbBr3, is emerging as a promising photo-sensitizer with excellent durability and thermal stability, but the efficiency is still embarrassing. In this work, we intend to address these issues by exploiting CsPbBr3 as light absorber, accompanied by using Cu-phthalocyanine (CuPc) as hole transport material (HTM) and carbon as counter electrode. The optimal device acquires a decent PCE of 6.21%, over 60% higher than those of the HTM-free devices. The systematic characterization and analysis reveal a more effective charge transfer process and a suppressed charge recombination in PSCs after introducing CuPc as hole transfer layer. More importantly, our devices exhibit an outstanding durability and a promising thermal stability, making it rather meaningful in future fabrication and application of PSCs.

【 授权许可】

Unknown