| Title | Molecular design enabled reduction of interface trap density affords highly efficient and stable perovskite solar cells with over 83% fill factor |
| Authors | Meng, Xiangyue Ho, Carr Hoi Yi Xiao, Shuang Bai, Yang Zhang, Teng Hu, Chen Lin, He Yang, Yinglong So, Shu Kong Yang, Shihe |
| Affiliation | Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China. Hong Kong Baptist Univ, Dept Phys, Kowloon Tong, Hong Kong, Peoples R China. Hong Kong Baptist Univ, Inst Adv Mat, Kowloon Tong, Hong Kong, Peoples R China. Peking Univ, Shenzhen Grad Sch, Sch Chem Biol & Biotechnol, Guangdong Key Lab Nanomicro Mat Res, Shenzhen 518055, Peoples R China. |
| Keywords | Perovskite solar cells Trap density Interlayer Fill factor ORGANOMETAL HALIDE PEROVSKITES POWER CONVERSION EFFICIENCY HIGH-PERFORMANCE FULLERENE DERIVATIVES CH3NH3PBI3 ELECTRON HYSTERESIS LENGTHS PHOTOVOLTAICS PASSIVATION |
| Issue Date | 2018 |
| Publisher | NANO ENERGY |
| Citation | NANO ENERGY. 2018, 52, 300-306. |
| Abstract | Advancing perovskite solar cell (PVSC) technologies toward its theoretical power conversion efficiency (PCE) and optimum stability requires stringent control over interfacial trap densities in the devices. By introducing a new macromolecular interlayer material of PPDIN6 at the PCBM/Ag interface for planar p-i-n PVSCs, we succeeded in significantly reducing the trap density, thereby facilitating electron extraction and suppressing electron recombination at the interface. Consequently, a PCE of 20.43% was achieved with a record fill factor of 83.4%, which is one of the highest values for planar p-i-n PVSCs. Moreover, the amine groups in PPDIN6 could neutralize the migrating iodide ions and thus inhibit the formation of the insulating Ag-I bonds on the surface of the Ag electrode. As a result, we realized long-term stability for PPDIN6 based PVSCs, which maintained 85% of their initial performance after continuous operation at their maximum power point for 200 h under 1-sun illumination in air with a relative humidity of 30-50%. |
| URI | http://hdl.handle.net/20.500.11897/517145 |
| ISSN | 2211-2855 |
| DOI | 10.1016/j.nanoen.2018.07.063 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 深圳研究生院待认领 |
