Efficient Photon Recycling and Radiation Trapping in Cesium Lead Halide Perovskite Waveguides

Dursun, İbrahim; Zheng, Yulong; Guo, Tianle; Bastiani, Michele De; Türedi, Bekir; Sinatra, Lutfan; Haque, Azimul; Sun, Bin; Zhumekenov, Ayan A.; Saidaminov, Makhsud I.; Arquer, F. Pelayo Garcı́a de; Sargent, Edward H.; Wu, Tom; Gartstein, Yuri N.; Bakr, Osman M.; Mohammed, Omar F.; Malko, Anton V.

doi:10.1021/acsenergylett.8b00758

Cited by 72 publications

(101 citation statements)

References 55 publications

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“…Intriguing phenomena such as anomalous photovoltaic effect, phonon recycling, and optical cooling have been observed in halide perovskites. [ 9–12 ] For example, it was recently proposed that bright triplet excitons are behind the frequently observed high PL quantum yield in halide perovskites. [ 13 ] Halide perovskites with the general chemical formula of ABX 3 , where A is an organic or inorganic cation, B a metal cation, and X a halide anion, present unique opportunities to realize versatile material properties through manipulating the cation and halide compositions.…”

Section: Introductionmentioning

confidence: 99%

Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity

et al. 2020

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The recent re-emergence of halide perovskites has received escalating interest for optoelectronic applications. In addition to photovoltaics, the multifunctional nature of halide perovskites has led to diverse applications. The ultralow thermal conductivity coupled with decent mobility and charge carrier tunability led to the prediction of halide perovskites as a possible contender for future thermoelectrics. Herein, recent advances in thermal transport of halide perovskites and their potentials and challenges for thermoelectrics are reviewed. An overview of the phonon behavior in halide perovskites, as well as the compositional dependency is analyzed. Understanding thermal transport and knowing the thermal conductivity value is crucial for creating effective heat dissipation schemes and determining other thermal-related properties like thermo-optic coefficients, hot-carrier cooling, and thermoelectric efficiency. Recent works on halide perovskite-based thermoelectrics together with theoretical predictions for their future viability are highlighted. Also, progress on modulating halide perovskite-based thermoelectric properties using light and chemical doping is discussed. Finally, strategies to overcome the limiting factors in halide perovskite thermoelectrics and their prospects are emphasized.

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Section: Introductionmentioning

confidence: 99%

Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity

et al. 2020

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“…These characteristics make them excellent candidates for optoelectronic applications such as lightemitting diodes [6][7] , lasers 8 , and photodetectors [9][10] . Unlike the well-studied three-dimensional (3D) perovskite structures (e.g., CsPbBr3) [11][12][13][14][15] , 0D perovskites are bulk quantum materials without corner-sharing connectivity; and as a result, their optical and photo-physical properties, such as exciton localization and self-trapping 16 , intrinsic Pb 2+ ion emissions 17 , and small-polaron generation 18 , are determined by the isolated [PbX6] 4octahedral units.…”

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confidence: 99%

Point Defects and Green Emission in Zero-Dimensional Perovskites

Yin

Yang

Song

et al. 2018

J. Phys. Chem. Lett.

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Zero-dimensional (0D) perovskites have recently opened a new frontier in device engineering for light conversion technologies due to their unprecedented high photoluminescence quantum yield as solids. Although many experimental and theoretical efforts have been made to understand their optical behavior, the origin of their green emission is still opaque. Here, we develop a complete experimental and theoretical picture of point defects in Cs-Pb-Br perovskites and demonstrate that bromide vacancies (V) in prototype 0D perovskite CsPbBr have a low formation energy and a relevant defect level to contribute to the midgap radiative state. Moreover, the state-of-the-art characterizations including atomic-resolution electron imaging not only confirm the purity of the 0D phase of Br-deficient green-emissive CsPbBr nanocrystals (NCs) but also exclude the presence of CsPbBr NCs impurities. Our findings provide robust evidence for defect-induced green luminescence in 0D perovskite NCs, which helps extend the scope of the utility of these bulk 0D quantum materials in optoelectronic applications.

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“…The emergence of CsPbBr 3 MW waveguides has recently come to light and whilst they do share some similarities with our CsPbI 3 waveguides the mechanisms governing their behaviour at certain wavelengths appears markedly different. In the case of the CsPbBr 3 MWs reported elsewhere, 36 above bandgap (2.36 eV) excitation results in PL emission, where the authors indicate a photon recycling mechanism. This was built partly from spectral shifting observations as a function of distance along the MW, as well as former reports on the charging of perovskite surface layers.…”

Section: Communication Materials Advancesmentioning

confidence: 70%