Efficient Planar Heterojunction Perovskite Solar Cells via Low-Pressure Proximity Evaporation Technique
| Autor: | Subramani Thiyagu, Ching-Fuh Lin, Sheng-Kai Chang, Po-Tsun Guo, Sheng-Pang Lin, Hsin-Che Lee |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Annealing (metallurgy) business.industry Photoconductivity Sequential deposition Nanotechnology Good control Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Grain growth Planar law Optoelectronics Electrical and Electronic Engineering Crystallization 0210 nano-technology business |
| Zdroj: | IEEE Journal of Photovoltaics. 7:184-190 |
| ISSN: | 2156-3403 2156-3381 |
| Popis: | The sequential deposition process is widely used to fabricate planar structure perovskite solar cells because of better uniformity and perfect surface coverage of perovskite films. However, it is difficult to control the crystallization of perovskite finely. Here, we improve the sequential deposition process by using a low-pressure proximity evaporation technique. The slow grain growth rate of perovskite (CH3NH3PbI3 ) would make large crystallization and high quality of perovskite film. Moreover, we manipulate an innovative double-side interdiffusion process, that is, sequentially deposit CH3NH3I/PbI2/CH 3NH3I to fabricate the perovskite layer. This way, PbI2 can be effectively converted into perovskite from a double side and achieve good control of CH3NH3I deposition on the surface as well. The devices reach an efficiency over 14%, which is the first time for TiO2 free cells fabricated by a low-pressure approach. |
| Databáze: | OpenAIRE |
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