2D/3D heterostructured CsPbI₂Br solar cells: a choice for a monolithic all-perovskite tandem device

Abstract

All-inorganic CsPbI2Br perovskite solar cells (PSCs) have attracted intensive attention owing to their suitable bandgaps and excellent photo- and thermal stability, making them promising ideal top cell in high-performance monolithic...

Progress and Perspective on Inorganic CsPbI2Br Perovskite Solar Cells

“…Besides CsPbI 2 Br/organic TSCs, CsPbI 2 Br/MAPbI 3 all-perovskite TSCs were also investigated and a PCE of 10.22% was obtained by Tao et al with structure of ITO/SnO 2 /CsPbI 2 Br/ Spiro-OMeTAD/PEDOT:PSS/C 60 /MAPbI 3 /Spiro-OMeTAD/Ag (Figure 16g). [187] The all-perovskite TSCs showed a champion PCE of 10.22% (Figure 16h) with a high V oc of 2.33 V. However, the TSC had a lower J sc , which was in line with the EQE spectrum (Figure 16i). Even though CsPbI 2 Br as a subcell of all-perovskite TSCs has been successfully verified, but performance optimization of the device needs to be further explored.…”

“…i) IPCE spectra of each sub-cell in the all-perovskite TSCs. Reproduced with permission [187]. Copyright 2022, Royal Society of Chemistry.…”

Inorganic CsPbI2Br halide perovskites: from fundamentals to solar cell optimizations

“…Thus, a higher PCE of 16.57% (a J SC of 15.92 mA cm −2 , a V OC of 1.28 V and a FF of 0.814) with outstanding stability under thermal and ambient stress was obtained for the device with 0.5 mg mL −1 GABr treatment. 88 Meanwhile, ionic liquids of 1-viny-3-propionate ethyl imidazolium chloride ([PEVIM]Cl), 89 1-butyl-2,3-dimethylimidazolium tetrafluoroborate (BMMIMBF 4 ) 90 and 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF 6 ) 91 have also been utilized as passivation layers at the CsPbI 2 Br/HTL interface to boost the performance and stability of CsPbI 2 Br PSCs. The interaction between [PEVIM]Cl with the undercoordinated Pb and Cs metal cations of CsPbI 2 Br induced the formation of highly crystalline and dense CsPbI 2 Br films with reduction in defect density.…”

Ionic Liquid Bridge Assisting Bifacial Defect Passivation for Efficient All-Inorganic Perovskite Cells with High Open-Circuit Voltage

“…4 On the one hand, carbon electrodes have good conductivity, suitable work function (W F ), and hydrophobicity. 5 On the other hand, due to their adjustable bandgap, superior thermal stability and quickly increasing efficiency, all-inorganic CsPbI x Br 3−x PSCs have exhibited enormous application potential in all-inorganic perovskite/ organic tandem solar cells (TSCs), 6 all-perovskite tandem solar cells, 7 underwater photovoltaics (UW PVs) 8 and indoor photovoltaics (IPVs). 9 For example, the PCE of CsPbI 2 Br/ organic TSCs has increased rapidly from 15.04% in 2019 10 to the current 23.21%.…”