摘要
作为一类新型薄膜太阳能电池,近年来钙钛矿太阳电池的发展十分迅速,其效率已接近商业化硅基太阳能电池,但是钙钛矿薄膜在空气中稳定性较差,严重限制了其进一步的商业化应用。本研究通过在钙钛矿薄膜中添加聚4-乙烯吡啶(PVP)来增强钙钛矿薄膜在空气中的稳定性。通过形貌、结构及性能测试,发现相比于未添加PVP的钙钛矿薄膜,添加PVP的钙钛矿薄膜形貌更均匀致密。添加0.4wt%PVP将钙钛矿太阳电池的光电效率从6.09%提升到13.07%,而且,存放在相对湿度超过50%的空气中,其电池效率衰减为一半的时间由原来的3 d延长到3 w,但是过多的PVP添加量会导致Pb I2与CH3NH3I反应不完全。添加PVP工艺进一步优化后,有望用于大面积、高稳定性的钙钛矿薄膜的制备。
As a type of novel thin film solar cells,perovskite solar cells develope sharply within a decade,which efficiency has approached to that of the commercial silicon solar cells.However,its poor stability in the air has limited the further practical application.Herein,we achieve uniform sable perovskite films under open environment by adding some poly 4-vinylpyridine (PVP).The morphology,structure and performance test results show that the perovskite films added with PVP were more compact and uniform than the bare one.Moreover,the assembled solar cell with 0.4wt% PVP exhibited highly reproducible efficiencies up to 13.07%,much higher than that of 6.09% for the controlled one.When restored in the air with approximately 50% relative humidity in the absence of encapsulation,its efficiency decay time to a half from 3 d for bare one extended to 3 w.However,high PVP additives result in incomplete reaction between PbI2 and CH3NH3I.If the above mentioned process is further optimized,is expected to be applied to the large-scale preparation of more stable perovskite film.
作者
熊浩
张渤昕
贾巍
张青红
谢华清
XIONG Hao;ZHANG Bo-Xin;JIA Wei;ZHANG Qing-Hong;XIE Hua-Qing(College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;State Key Laboratory of Space Power Technology,Shanghai Institute of Power-Sources,Shanghai 200245,China;College of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China)
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2019年第1期96-102,共7页
Journal of Inorganic Materials
基金
国家自然科学基金重大项目(51590902)
中央高校基本科研业务费专项资金(CUSF-DH-D-2017038)~~
