气候变化领域集成服务门户(CCPortal): Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells

CCPortal

DOI	10.1039/c7ee02415k
	Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells
	Tress W.; Yavari M.; Domanski K.; Yadav P.; Niesen B.; Correa Baena J.P.; Hagfeldt A.; Graetzel M.
发表日期	2018
ISSN	17545692
起始页码	151
结束页码	165
卷号	11 期号:1
英文摘要	Metal halide perovskite absorber materials are about to emerge as a high-efficiency photovoltaic technology. At the same time, they are suitable for high-throughput manufacturing characterized by a low energy input and abundant low-cost materials. However, a further optimization of their efficiency, stability and reliability demands a more detailed optoelectronic characterization and understanding of losses including their evolution with time. In this work, we analyze perovskite solar cells with different architectures (planar, mesoporous, HTL-free), employing temperature dependent measurements (current-voltage, light intensity, electroluminescence) of the ideality factor to identify dominating recombination processes that limit the open-circuit voltage (Voc). We find that in thoroughly-optimized, high-Voc (≈1.2 V) devices recombination prevails through defects in the perovskite. On the other hand, irreversible degradation at elevated temperature is caused by the introduction of broad tail states originating from an external source (e.g. metal electrode). Light-soaking is another effect decreasing performance, though reversibly. Based on FTPS measurements, this degradation is attributed to the generation of surface defects becoming a new source of non-radiative recombination. We conclude that improving long-term stability needs to focus on adjacent layers, whereas a further optimization of efficiency of top-performing devices requires understanding of the defect physics of the nanocrystalline perovskite absorber. Finally, our work provides guidelines for the design of further dedicated studies to correctly interpret the diode ideality factor and decrease recombination losses. © The Royal Society of Chemistry.
英文关键词	Characterization; Light; Metal halides; Nanocrystals; Nanostructured materials; Open circuit voltage; Perovskite; Solar cells; Surface defects; Timing circuits; Diode ideality factors; Irreversible degradation; Non-radiative recombinations; Optoelectronic characterization; Photovoltaic technology; Recombination process; Stability and reliabilities; Temperature-dependent measurements; Perovskite solar cells; degradation; efficiency measurement; electronic equipment; energy; fuel cell; manufacturing; optimization; performance assessment; perovskite
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/190348
作者单位	Laboratory for Photonics and Interfaces, Institute of Chemical Sciences Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, 1015, Switzerland; Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, 1015, Switzerland; Photovoltaics and Thin-Film Electronics Laboratory, Institute of Microengineering, École Polytechnique Fédérale de Lausanne, Neuchâtel, 2002, Switzerland; Massachusetts Institute of Technology, Cambridge, MA 02139, United States
推荐引用方式 GB/T 7714	Tress W.,Yavari M.,Domanski K.,et al. Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells[J],2018,11(1).
APA	Tress W..,Yavari M..,Domanski K..,Yadav P..,Niesen B..,...&Graetzel M..(2018).Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells.Energy & Environmental Science,11(1).
MLA	Tress W.,et al."Interpretation and evolution of open-circuit voltage, recombination, ideality factor and subgap defect states during reversible light-soaking and irreversible degradation of perovskite solar cells".Energy & Environmental Science 11.1(2018).