Photoluminescence in Organometal Halide Perovskites: Free Carrier Versus Exciton
نویسندگان
چکیده
منابع مشابه
The nature of free-carrier transport in organometal halide perovskites
Organometal halide perovskites are attracting great attention as promising material for solar cells because of their high power conversion efficiency. The high performance has been attributed to the existence of free charge carriers and their large diffusion lengths, but the nature of carrier transport at the atomistic level remains elusive. Here, nonadiabatic quantum molecular dynamics simulat...
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Characteristics of nanoscale materials are often different from the corresponding bulk properties providing new, sometimes unexpected, opportunities for applications. Here we investigate the properties of 8 nm colloidal nanoparticles of MAPbBr3 perovskites and contrast them to the ones of large microcrystallites representing a bulk. X-ray spectroscopies provide an exciton binding energy of 0.32...
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Solar cells based on organometal halide perovskites have seen rapidly increasing efficiencies, now exceeding 15%. Despite this progress, there is still limited knowledge on the fundamental photophysics. Here we use microwave photoconductance and photoluminescence measurements to investigate the temperature dependence of the carrier generation, mobility, and recombination in (CH3NH3)PbI3. At tem...
متن کاملPhotoferroelectric and Photopiezoelectric Properties of Organometal Halide Perovskites.
Piezoelectrics play a critical role in various applications. The permanent dipole associated with the molecular cations in organometal halide perovskites (OMHPs) may lead to spontaneous polarization and thus piezoelectricity. Here we explore the piezoelectric properties of OMHPs with density functional theory. We find that the piezoelectric coefficient depends sensitively on the molecular order...
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A facile hydrothermal method was developed to prepare CH3NH3PbBr3 and CH3NH3PbI3. The as-prepared products were utilized in lithium batteries as anode materials with good performance. Considering the structural diversity, more hybrid perovskites can be targets for further optimization, indicating their promising potential in Li-ion battery applications.
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ژورنال
عنوان ژورنال: IEEE Journal of Photovoltaics
سال: 2017
ISSN: 2156-3381,2156-3403
DOI: 10.1109/jphotov.2016.2633804