Abstract

Tetragonal phases for perovskite solar cells The power conversion efficiencies (PCEs) of all-inorganic perovskites are lower than those of materials with organic cations. This is in part because these materials have larger bandgaps. The cubic crystal phases of these materials also exhibit poor stability. Wang et al. synthesized the tetragonal β-phase of CsPbI 3 from HPbI 3 and CsI. The material exhibited higher stability and a more favorable bandgap, which allowed for PCEs of 15%. Passivation of the surface trap state with choline iodide boosted PCEs to 18%. Science , this issue p. 591

Keywords

Perovskite (structure)IodideAnalytical Chemistry (journal)Band gapLayer (electronics)Materials sciencePhase (matter)IonChemistryChemical engineeringOptoelectronicsCrystallographyInorganic chemistryNanotechnologyChromatography

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Year
2019
Type
article
Volume
365
Issue
6453
Pages
591-595
Citations
1178
Access
Closed

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Yong Wang, M. Ibrahim Dar, Luis K. Ono et al. (2019). Thermodynamically stabilized β-CsPbI <sub>3</sub> –based perovskite solar cells with efficiencies &gt;18%. Science , 365 (6453) , 591-595. https://doi.org/10.1126/science.aav8680

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DOI
10.1126/science.aav8680