2015
DOI: 10.1103/physrevb.92.235210
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Excitonic emissions and above-band-gap luminescence in the single-crystal perovskite semiconductorsCsPbBr3andCsPbCl3

Abstract: 8The ternary compounds CsPbX3 (X= Br or Cl) have perovskite structures that are being 9 considered for optical and electronic applications such as lasing and gamma ray detection. 10Above bandgap excitonic photoluminescence (PL) band is seen in both CsPbX3 compounds. An

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Cited by 295 publications
(141 citation statements)
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“…A clear defined absorption onset estimates a bandgap of 2.23 eV . The steady‐state photoluminescence in Figure S5b (Supporting Information) shows an emission at 2.32 eV which corresponds well to previously observed bound exciton emission . Generally and in contrast to nanocrystalline CsPbBr 3 , the photoluminescence quantum efficiency of crystalline CsPbBr 3 is low due the slight indirect bandgap character of the orthorhombic RT phase …”
Section: Resultssupporting
confidence: 84%
“…A clear defined absorption onset estimates a bandgap of 2.23 eV . The steady‐state photoluminescence in Figure S5b (Supporting Information) shows an emission at 2.32 eV which corresponds well to previously observed bound exciton emission . Generally and in contrast to nanocrystalline CsPbBr 3 , the photoluminescence quantum efficiency of crystalline CsPbBr 3 is low due the slight indirect bandgap character of the orthorhombic RT phase …”
Section: Resultssupporting
confidence: 84%
“…The long first‐order lifetimes τ 1 = k 1 −1 ≈0.1–1 μs are indicative of the absence of deep defect states, which have high formation energies in MHPs . In MHP bulk systems, lower first‐order recombination rates and conversely long minority carrier lifetimes obtained from time‐resolved PL (τavgk1-1 ) are indicators of a low defect concentration and desirable in both LEDs and solar cells.…”
Section: Charge‐carrier Generation and Recombination Kineticsmentioning
confidence: 55%
“…27), MAPbBr 3 (refs 52, 53), CsPbBr 3 (refs 54, 55) as 13 meV, 18 meV and 16 meV, respectively, by taking into account both the experimental and theoretical estimations performed before and also the band structure we presented in Fig. 3.…”
Section: Resultsmentioning
confidence: 99%