Unveiling the light soaking effects of the CsPbI3 perovskite solar cells

Cai, BinDalian Univ Technol DUT, Inst Artificial Photosynth, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China. (author)

QC 20200915
Pure inorganic perovskite of CsPbI3 attracts great attentions due to its excellent thermal stability and more suitable bandgap for tandem solar cells. The power conversion efficiency (PCE) of CsPbI3 perovskite solar cells has swiftly increased to 19.03%. However, extensive researches on the material property and photovoltaic characterization are rather rare in the literatures. In this study, a remarkable light soaking effect is found in the CsPbI3 based perovskite solar cells as the PCE increases from 10.8% to 18.3% after 180 s soaking under AM 1.5G sunlight. Mechanisms behind this reproducible soaking effect have also been studied. It reveals that the depressed dark current caused by a stronger built-in field and the decreased defects density passivated by the photogenerated electrons result in the enhanced PCE after light soaking. Moreover, we carefully characterize that the supposed "HPbI3" should be "DMAPbI(3)" synthesized through anti-solvent vapor recrystallisation method.

Yang, XichuanDalian Univ Technol DUT, Inst Artificial Photosynth, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China. (author)
Yu, ZeDalian Univ Technol DUT, Inst Artificial Photosynth, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China. (author)
Liang, YongqiLanzhou Univ, Inst Phys Chem, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China. (author)
Shan, YuDalian Univ Technol DUT, Inst Artificial Photosynth, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China. (author)
Hagfeldt, AndersEcole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photomol Sci, CH-1015 Lausanne, Switzerland. (author)
Sun, Licheng,1962-KTH,Kemi,Dalian Univ Technol DUT, Inst Artificial Photosynth, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China.(Swepub:kth)u1umfd9h (author)
Dalian Univ Technol DUT, Inst Artificial Photosynth, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China.Lanzhou Univ, Inst Phys Chem, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China. (creator_code:org_t)

By the author/editor: Cai, Bin; Yang, Xichuan; Yu, Ze; Liang, Yongqi; Shan, Yu; Hagfeldt, Anders; show more...; Sun, Licheng, 19 ...; show less...

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