N and p-type properties in organo-metal halide perovskites studied by Seebeck effects
| Autor: | Stefan Haacke, Hsin Wang, Yu-Che Hsiao, Ting Wu, Mahshid Ahmadi, Li Liu, Qing Liu, Bin Hu |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry(all)
Inorganic chemistry Halide 02 engineering and technology 010402 general chemistry 01 natural sciences Capacitance Chloride Ion Biomaterials Metal Seebeck coefficient Thermoelectric effect Materials Chemistry medicine Electrical and Electronic Engineering Polarization (electrochemistry) Chemistry General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Chemical physics visual_art visual_art.visual_art_medium 0210 nano-technology medicine.drug |
| Zdroj: | Organic Electronics. 35:216-220 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2016.05.025 |
| Popis: | Organo-metal halide perovskites can exhibit co-existed electrical polarizations and semiconducting properties respectively from organic and inorganic components. Here, we find that the Seebeck coefficient can be changed between positive and negative values when the concentration of chloride ions is varied between single-halide (CH3NH3PbI3) and mixed-halide structures (CH3NH3PbIxCl3−x). This indicates that varying the concentration of chloride ions can tune the semiconducting properties between the n-type and p-type regimes in the organo-metal halide perovskites. Our temperature-dependent capacitance measurement shows that increasing temperature can cause a change on internal electrical polarization. As a result, we can propose that the internal polarization functions as the underlying mechanism responsible for large temperature-dependent Seebeck coefficients in organo-metal halide perovskites operating between n-type and p-type regimes. |
| Databáze: | OpenAIRE |
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