Thermal engineering of FAPbI
| Autor: | Vanessa L, Pool, Benjia, Dou, Douglas G, Van Campen, Talysa R, Klein-Stockert, Frank S, Barnes, Sean E, Shaheen, Md I, Ahmad, Maikel F A M, van Hest, Michael F, Toney |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Lead halide perovskites have emerged as successful optoelectronic materials with high photovoltaic power conversion efficiencies and low material cost. However, substantial challenges remain in the scalability, stability and fundamental understanding of the materials. Here we present the application of radiative thermal annealing, an easily scalable processing method for synthesizing formamidinium lead iodide (FAPbI3) perovskite solar absorbers. Devices fabricated from films formed via radiative thermal annealing have equivalent efficiencies to those annealed using a conventional hotplate. By coupling results from in situ X-ray diffraction using a radiative thermal annealing system with device performances, we mapped the processing phase space of FAPbI3 and corresponding device efficiencies. Our map of processing-structure-performance space suggests the commonly used FAPbI3 annealing time, 10 min at 170 °C, can be significantly reduced to 40 s at 170 °C without affecting the photovoltaic performance. The Johnson-Mehl-Avrami model was used to determine the activation energy for decomposition of FAPbI3 into PbI2. Processing is crucial to ensure material quality and stability in perovskite solar cells. Here, Pool et al. develop a scalable infrared annealing method and use in situ XRD to map the processing phase space relative to the device efficiency. This provides a tool to determine processing requirements. |
| Databáze: | OpenAIRE |
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