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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 CsPbBr3as light absorber, accompa-nied 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 recombi-nation 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.