Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite
Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite
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DOI：
10.1002/aenm.201500477
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发表时间：
2015-08-05
影响因子：
27.8
通讯作者：
Boyen, Hans-Gerd
中科院分区：
文献类型：
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作者：
Conings, Bert;Drijkoningen, Jeroen;Boyen, Hans-Gerd
有机铅卤化物钙钛矿目前是混合太阳能电池中作为光吸收剂的新的领跑者，因为它们结合了联合收割机效率，已经超过20%，沉积温度低于100摄氏度和廉价的基于溶液的制造路线。长期稳定性仍然是工业规模应用的主要障碍。在此，证明了即使在惰性气氛中，在85 ℃下对甲基铵三碘化铅钙钛矿进行退火期间也已经发生了显著的分解效应，从而违反了国际标准。观察到的行为支持目前使用的钙钛矿材料作为低形成能的软物质系统的观点，因此代表了其应用的主要瓶颈，特别是在平均温度高的国家。这一结果可以引发对具有改善的热稳定性的新钙钛矿家族的更广泛的搜索。
Organolead halide perovskites currently are the new front-runners as light absorbers in hybrid solar cells, as they combine efficiencies passing already 20% with deposition temperatures below 100 degrees C and cheap solution-based fabrication routes. Long-term stability remains a major obstacle for application on an industrial scale. Here, it is demonstrated that significant decomposition effects already occur during annealing of a methylammonium lead triiode perovskite at 85 degrees C even in inert atmosphere thus violating international standards. The observed behavior supports the view of currently used perovskite materials as soft matter systems with low formation energies, thus representing a major bottleneck for their application, especially in countries with high average temperatures. This result can trigger a broader search for new perovskite families with improved thermal stability.