气候变化领域集成服务门户(CCPortal): Design and understanding of encapsulated perovskite solar cells to withstand temperature cycling

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DOI	10.1039/c7ee02564e
	Design and understanding of encapsulated perovskite solar cells to withstand temperature cycling
	Cheacharoen R.; Rolston N.; Harwood D.; Bush K.A.; Dauskardt R.H.; McGehee M.D.
发表日期	2018
ISSN	17545692
起始页码	144
结束页码	150
卷号	11 期号:1
英文摘要	The performance of perovskite solar cells has rapidly increased above 22%, and their environmental stability is also progressing. However, the mismatch in thermal expansion coefficients and low fracture energy of layers in perovskite solar cells raise a concern as to whether devices can withstand mechanical stresses from temperature fluctuations. We measured the fracture energy of a perovskite film stack, which was shown to produce 23.6% efficiency when incorporated in a monolithic perovskite-silicon tandem. We found that the fracture energy increased by a factor of two after 250 standardized temperature cycles between -40 °C and 85 °C and a factor of four after laminating an encapsulant on top of the stack. In order to observe how the increased mechanical stability translated from film stacks to device performance and reliability, we carried out a comparative study of perovskite solar cells packaged between glass and two commonly used encapsulants with different elastic moduli. We demonstrated that solar cells encapsulated with a stiffer ionomer, Surlyn, severely decreased in performance with temperature cycling and delaminated. However, the solar cells encapsulated in softer ethylene vinyl acetate withstood temperature cycling and retained over 90% of their initial performance after 200 temperature cycles. This work demonstrates a need for an encapsulant with a low elastic modulus to enable mechanical stability and progress toward 25 year operating lifetime. © The Royal Society of Chemistry.
英文关键词	Elastic moduli; Ethylene; Fracture; Fracture energy; Mechanical stability; Perovskite; Perovskite solar cells; Thermal expansion; Thermoplastic elastomers; Comparative studies; Environmental stability; Ethylene vinyl acetates; Low elastic modulus; Temperature cycles; Temperature cycling; Temperature fluctuation; Thermal expansion coefficients; Solar cells; comparative study; design; elastic modulus; ethylene; film; fuel cell; glass; performance assessment; perovskite; silicon; temperature; thermal expansion
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190346
作者单位	Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Department of Applied Physics, Stanford University, Stanford, CA 94305, United States; D2 Solar, San Jose, CA 95131, United States
推荐引用方式 GB/T 7714	Cheacharoen R.,Rolston N.,Harwood D.,et al. Design and understanding of encapsulated perovskite solar cells to withstand temperature cycling[J],2018,11(1).
APA	Cheacharoen R.,Rolston N.,Harwood D.,Bush K.A.,Dauskardt R.H.,&McGehee M.D..(2018).Design and understanding of encapsulated perovskite solar cells to withstand temperature cycling.Energy & Environmental Science,11(1).
MLA	Cheacharoen R.,et al."Design and understanding of encapsulated perovskite solar cells to withstand temperature cycling".Energy & Environmental Science 11.1(2018).