Hybrid Perovskites for Photovoltaics: Charge-Carrier Recombination, Diffusion, and Radiative Efficiencies
نویسندگان
چکیده
منابع مشابه
Charge carrier mobility in hybrid halide perovskites
The charge transport properties of hybrid halide perovskites are investigated with a combination of density functional theory including van der Waals interaction and the Boltzmann theory for diffusive transport in the relaxation time approximation. We find the mobility of electrons to be in the range 5-10 cm(2)V(-1)s(-1) and that for holes within 1-5 cm(2)V(-1)s(-1), where the variations depend...
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Organolead trihalide perovskites are shown to exhibit the best of both worlds: charge-carrier mobilities around 10 cm2 V−1 s−1 and low bi-molecular charge-recombination constants. The ratio of the two is found to defy the Langevin limit of kinetic charge capture by over four orders of magnitude. This mechanism causes long (micrometer) charge-pair diffusion lengths crucial for flat-heterojunctio...
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Until now, metal–organic hybrid perovskites (MOHPs) have been known mainly for their remarkable electronic (1–3) and optical properties, generating immense interest worldwide and offering the potential to realize the goal of highly efficient and inexpensive solar power conversion (1, 4, 5) as well as a wide variety of other optoelectronic applications (6, 7). In an exciting development that pro...
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Impressive performance of hybrid perovskite solar cells reported in recent years still awaits a comprehensive understanding of its microscopic origins. In this work, the intrinsic Hall mobility and photocarrier recombination coefficient are directly measured in these materials in steady-state transport studies. The results show that electron-hole recombination and carrier trapping rates in hybr...
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ژورنال
عنوان ژورنال: Accounts of Chemical Research
سال: 2015
ISSN: 0001-4842,1520-4898
DOI: 10.1021/acs.accounts.5b00411