دورية أكاديمية
Structure and Charge Carrier Separation Promotion Effects of Antiphase Boundaries in Cesium Lead Bromide
| العنوان: | Structure and Charge Carrier Separation Promotion Effects of Antiphase Boundaries in Cesium Lead Bromide |
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| المؤلفون: | Kepeng Song, Yingcai Fan, Wei Qin |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Biophysics, Biochemistry, Cell Biology, Genetics, Plant Biology, Space Science, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, photogenerated charge carriers, lead halide perovskites, induce band offsets, crystal engineering technique, significant lattice distortions, 6 , 3 , charge carrier separation, significant impact, ̵ octahedra, valence bands, using aberration, three types, stem images, quantitative analyses, optoelectronic properties, fully understood, findings provide, edge sharing, double layers, displacement vector, csbr layers |
| الوصف: | Defects in lead halide perovskites (LHPs) may have a significant impact on charge carrier separation, but the roles of the defects are not fully understood. Here, using aberration-corrected scanning transmission electron microscopy (STEM), different types of antiphase boundaries (APBs) are discovered in CsPbBr 3 platelets. APBs with a displacement vector of 1/4[111] are characterized by double layers of CsBr layers at the (110) or (001) planes, while APBs at the (112) planes are formed through edge sharing of PbBr 6 ̵octahedra. Significant lattice distortions are determined at (001) and (110) APBs on the basis of quantitative analyses of STEM images. Density functional theory calculations demonstrate that all three types of APBs can induce band offsets at their valence bands and conduction bands. The APBs are intended to promote the separation of photogenerated charge carriers in LHPs. These findings provide a crystal engineering technique for enhancing the optoelectronic properties of LHPs by controlling defects. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/journal_contribution/Structure_and_Charge_Carrier_Separation_Promotion_Effects_of_Antiphase_Boundaries_in_Cesium_Lead_Bromide/25259816Test |
| DOI: | 10.1021/acs.jpclett.4c00099.s001 |
| الإتاحة: | https://doi.org/10.1021/acs.jpclett.4c00099.s001Test https://figshare.com/articles/journal_contribution/Structure_and_Charge_Carrier_Separation_Promotion_Effects_of_Antiphase_Boundaries_in_Cesium_Lead_Bromide/25259816Test |
| حقوق: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.DCB62A7D |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acs.jpclett.4c00099.s001 |
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