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Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells
文献类型：期刊论文
| 作者 | Li, Can3; Liu, Shengzhong (Frank)1,3; Chang, Robert P. H.4; Yang, Ruixia3; Yang, Zhou1; Yu, Wei3; Wang, Xiuli3; Zhou, Xin2; Yang, Dong1 |
| 刊名 | ENERGY & ENVIRONMENTAL SCIENCE
 |
| 出版日期 | 2016 |
| 卷号 | 9期号:10页码:3071-3078 |
| ISSN号 | 1754-5692 |
| DOI | 10.1039/c6ee02139e |
| 文献子类 | Article |
| 英文摘要 | The electron-transport layer (ETL) between the active perovskite material and the cathode plays a critical role in planar perovskite solar cells. Herein, we report a drastically improved solar cell efficiency via surface optimization of the TiO2 ETL using a special ionic-liquid (IL) that shows high optical transparency and superior electron mobility. As a consequence, the efficiency is promoted to as high as 19.62% (the certified efficiency is 19.42%), exceeding the previous highest efficiency recorded for planar CH3NH3PbI3 perovskite solar cells. Surprisingly, the notorious hysteresis is completely eliminated, likely due to the improved ETL quality that has effectively suppressed ion migration in the perovskite layer and charge accumulation at the interfaces, higher electron mobility to balance the hole flux at the anode, and a better growth platform for the high quality perovskite absorber. Both experimental analyses and theoretical calculations reveal that the anion group of the IL bonds to TiO2, leading to a higher electron mobility and a wellmatched work function. Meanwhile, the cation group interfaces with adjacent perovskite grains to provide an effective channel for electron transport and a suitable setting to grow low trap-state density perovskite for improved device performance. |
| WOS关键词 | POWER CONVERSION EFFICIENCY ; HALIDE PEROVSKITES ; FILMS ; TIO2 ; LAYER ; CRYSTALLIZATION ; EXTRACTION ; DEPOSITION ; STABILITY ; PRECURSOR |
| WOS研究方向 | Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000386336200007 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169958]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Li, Can; Liu, Shengzhong (Frank) |
| 作者单位 | 1.Shaanxi Normal Univ, Natl Minist Educ, Shaanxi Engn Lab Adv Energy Technol, Sch Mat Sci & Engn,Key Lab Appl Surface & Colloid, Xian 710119, Peoples R China 2.Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China 4.Northwestern Univ, ANSER Ctr, Dept Mat Sci & Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA |
| 推荐引用方式 GB/T 7714 | Li, Can,Liu, Shengzhong ,Chang, Robert P. H.,et al. Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells[J]. ENERGY & ENVIRONMENTAL SCIENCE,2016,9(10):3071-3078. |
| APA | Li, Can.,Liu, Shengzhong .,Chang, Robert P. H..,Yang, Ruixia.,Yang, Zhou.,...&Yang, Dong.(2016).Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells.ENERGY & ENVIRONMENTAL SCIENCE,9(10),3071-3078. |
| MLA | Li, Can,et al."Surface optimization to eliminate hysteresis for record efficiency planar perovskite solar cells".ENERGY & ENVIRONMENTAL SCIENCE 9.10(2016):3071-3078. |
入库方式： OAI收割
来源：大连化学物理研究所
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