Anion Exchange-Induced Crystal Engineering via Hot-Pressing Sublimation Affording Highly Efficient and Stable Perovskite Solar Cells

doi:10.1002/solr.202000729

	Anion Exchange-Induced Crystal Engineering via Hot-Pressing Sublimation Affording Highly Efficient and Stable Perovskite Solar Cells
	Ding, Bin 3; Peng, Jun 1; Chu, Qian-Qian 4; Zhao, Shenyou 1; Shen, Heping 1; Weber, Klaus J.1; Yang, Guan-Jun 2; White, Thomas P.1; Catchpole, Kylie R.1; Nazeeruddin, Mohammad Khaja 3
刊名	SOLAR RRL
	2021-01
卷号	5 期号:3 页码:-
关键词	Cell engineering Conversion efficiency Crystal engineering Crystal orientation Efficiency Grain boundaries Growth rate Hot pressing Layered semiconductors Lead compounds Perovskite Sublimation Thin film solar cells Thin films Ambient conditions Chemical equilibriums High power conversion Perovskite thin films Photovoltaic performance Steady-state efficiency Thermal annealing process Uniform temperature
ISSN号	2367-198X
DOI	10.1002/solr.202000729
英文摘要	Crystalline, dense, and uniform perovskite thin films are crucial for achieving high-power conversion efficiency solar cells. Herein, a universal method of fabricating highly crystalline and large-grain perovskite films via crystal engineering is demonstrated. Anion exchange of Cl- and I-, and annealing perovskite films, in an ultraconfined and uniform temperature enclosed space with saturated MAI (or FAI) vapor using hot-pressing sublimation technology are conducted. This process ensures a rapid crystal growth rate due to fast exchange between the gas phase and the crystalline film to reduce vertically oriented grain boundaries. The generation of the commonly observed PbI2 phase is also suppressed due to the chemical equilibrium state during the thermal annealing process. Using this approach, pinhole-free perovskite films with preferred crystal orientation and micrometer-scale grains are obtained, leading to a high steady-state efficiency of 22.15% based on mixed-cation perovskite composition. In addition, devices based on different perovskite compositions all exhibit enhanced photovoltaic performance based on the crystal engineering method. The device (without encapsulation) has an efficiency loss of about only 4% after 2520 h of aging in ambient conditions and retains 87% of its initial efficiency after 1000 h of continuous 1 Sun light soaking, thus demonstrating considerably improved stability.
WOS研究方向	Energy & Fuels ; Materials Science
语种	英语
出版者	John Wiley and Sons Inc
WOS记录号	WOS:000611662900001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147320]
专题	材料科学与工程学院
作者单位	1.Australian Natl Univ, Res Sch Elect Energy & Mat Engn, Canberra, ACT 2601, Australia; 2.Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, 28 West Xianning Rd, Xian 710049, Shaanxi, Peoples R China 3.Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn, CH-1951 Sion, Switzerland; 4.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China;
推荐引用方式 GB/T 7714	Ding, Bin,Peng, Jun,Chu, Qian-Qian,et al. Anion Exchange-Induced Crystal Engineering via Hot-Pressing Sublimation Affording Highly Efficient and Stable Perovskite Solar Cells[J]. SOLAR RRL,2021,5(3):-.
APA	Ding, Bin.,Peng, Jun.,Chu, Qian-Qian.,Zhao, Shenyou.,Shen, Heping.,...&Dyson, Paul J..(2021).Anion Exchange-Induced Crystal Engineering via Hot-Pressing Sublimation Affording Highly Efficient and Stable Perovskite Solar Cells.SOLAR RRL,5(3),-.
MLA	Ding, Bin,et al."Anion Exchange-Induced Crystal Engineering via Hot-Pressing Sublimation Affording Highly Efficient and Stable Perovskite Solar Cells".SOLAR RRL 5.3(2021):-.