Highly efficient and stable hole-transport-layer-free inverted perovskite solar cells achieved 22% efficiency through p-type molecular synergistic doping

Zhou，Xianyong1,2,3,4; Zhang，Luozheng1,2,3,4,5; Hu，Hang1,2,3,4; Jiang，Zhengyan1,2,3,4; Wang，Deng1,2,3,4; Chen，Jiabang1,2,3,4; Li，Yaru1,2,3,4,5; Wu，Jiawen1,2,3,4,5; Zhang，Yong1,2,3,4,5; Zhang，Meiqing6; Liu，Chang1,2,3,4,5; Peng，Yuanjun7; Wang，Xingzhu1,2,3,4,5,7; Xu，Baomin1,2,3,4

2022-12-15

10.1016/j.nanoen.2022.107988

Nano Energy   Impact Factor & Quartile

2211-2855

2211-3282

low-cost, facile manufacturing processes are becoming more and more important for commercialization of perovskite solar cells (PSCs). In this aspect, the development of hole-transport-layer-free (HTL-free) PSC is particularly important. In this paper, we fabricated HTL-free PSC with improved photovoltaic performance via synergistic doping Cu(thiourea)Cl (Cu(Tu)Cl) and thiosemicarbazide into the perovskite precursor solution to obtain high-quality perovskite films with average grains of more than 1 µm. This synergistic doping strategy can simultaneously decrease perovskite surface and internal defects and mitigate interfacial energy barrier, which is superior to the present single passivation method which brings about defect passivation deficiency. As a result, compared to the control device with the efficiency of 13.10%, the HTL-free perovskite device prepared by synergistic doping strategy achieves a remarkable PCE of 22% with almost negligible hysteresis, which is the highest PCE values reported so far for the HTL-free PSCs. In addition, the environmental, thermal and long-term operational stabilities of the optimized devices prepared by synergistic doping strategy are significantly improved compare to the control devices. Especially, the unencapsulated optimized device retains 90% of the original efficiency under continuous illumination (100 mW cm) for 1000 h with the maximum power point (MPP) tracking in nitrogen-filled test box. Furthermore, this strategy has been shown to be effective in wide-bandgap perovskite. The wide-bandgap perovskite CsMAFAPb(IBr) (1.65 eV) based HTL-free device achieves a PCE of 19.7% with an Voc of 1.2 V, which is the highest PCE values reported so far for the HTL-free wide-bandgap PSCs, which opens a new way to fabricate HTL-free perovskite-based tandem solar cells. This work manifests a noteworthy step towards the facile, cost-efficient fabricating of PSCs with both high efficiency and simple manufacturing processes.

Cu(Tu)Cl Hole-transport-layer-free P-type molecular doping Perovskite solar cells Thiosemicarbazide

SCI

English

First ; Corresponding

Basic and Applied Basic Research Foundation of Guangdong Province[2019B1515120083];Natural Science Foundation of Guangdong Province[2020A1515010980];National Natural Science Foundation of China[61904076];National Natural Science Foundation of China[U19A2089];

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000897830000004

ELSEVIER

2-s2.0-85141513104

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Engineering Research and Development Center for Flexible Solar Cells,Southern University of Science and Technology,Shenzhen,518055,China
3.Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong,Southern University of Science and Technology,Shenzhen,518055,China
4.Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China
5.SUSTech Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
6.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
7.Shenzhen Putai Technology Co.,Ltd,Shenzhen,Longhua District,518000,China

Zhou，Xianyong,Zhang，Luozheng,Hu，Hang,et al. Highly efficient and stable hole-transport-layer-free inverted perovskite solar cells achieved 22% efficiency through p-type molecular synergistic doping[J]. Nano Energy,2022,104.

Zhou，Xianyong.,Zhang，Luozheng.,Hu，Hang.,Jiang，Zhengyan.,Wang，Deng.,...&Xu，Baomin.(2022).Highly efficient and stable hole-transport-layer-free inverted perovskite solar cells achieved 22% efficiency through p-type molecular synergistic doping.Nano Energy,104.

Zhou，Xianyong,et al."Highly efficient and stable hole-transport-layer-free inverted perovskite solar cells achieved 22% efficiency through p-type molecular synergistic doping".Nano Energy 104(2022).