Titanium Nanopillar Arrays Functioning as Electron Transporting Layers for Efficient, Anti-Aging Perovskite Solar Cells

Zhao，Jie1,2; Sun，Peng3,4; Wu，Zhongwei5; Li，Jun1; Wang，Xiaohan1; Xiao，Ting5; Yang，Lin6; Zheng，Zijian5; Huang，Zhifeng3,6,7

2020

10.1002/smll.202004778

Small   影响因子和分区

1613-6810

1613-6829

Electron transporting layers (ETLs), required to be optically transparent in perovskite solar cells (PSCs) having regular structures, possess a determinant effect on electron extraction and collection. Metal oxides (e.g., TiO) have overwhelmingly served as ETLs, but usually have low electron mobility (μ < 10 cm V s) not favorable for photovoltaic conversion. Here, metal oxides are replaced with metals (e.g., Ti with μ ≈ 294 cm V s) that are sculptured via glancing angle deposition to be a close-packed nanopillar array (NaPA), which vertically protrudes on a transparent electrode to obtain sufficient optical transmission for light harvesting in perovskite. Ti NaPAs, whose rough surfaces are passivated with 5 nm thick TiO (i.e., Ti NaPAs@TiO) to suppress exciton recombination, lead to the champion power conversion efficiency (PCE) of 18.89% that is superior to that of MAPbI PSCs without Ti NaPAs@TiO or containing TiO NaPAs@TiO, owing to high surface wettability, high μ, and relatively low work function of Ti. Furthermore, Ti NaPAs@TiO effectively prevents the decomposition of MAPbI to achieve long-term shelf stability whereby 50-day aging only causes 15% PCE degradation. This work paves the way toward widening the material spectrum, from semiconductors to metals, to generate a diverse range of ETLs for producing efficient optoelectronic devices with long-term shelf stability.

electron transporting layers glancing angle deposition perovskite solar cells shelf stability titanium nanopillars

SCI ; EI

英语

其他

HKBU[RC-ICRS/15-16/02] ; The Hong Kong Polytechnic University[1-ZVK1][HKBU8/CRF/11E] ; National Natural Science Foundation of China[21504061] ; Natural Science Foundation of Jiangsu Province[BK20191425] ; Hong Kong Scholars Program[HKSP 2017-065]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000598906600001

WILEY-V C H VERLAG GMBH

20205109633297

Metals ; Perovskite ; Perovskite solar cells ; Transparent electrodes ; Electrons ; Deposition ; Optoelectronic devices ; Bismuth compounds ; Light transmission

Minerals:482.2 ; Solar Cells:702.3 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Chemical Operations:802.3 ; Inorganic Compounds:804.2

2-s2.0-85097522429

Scopus

1.School of Energy,Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province,Soochow University,Suzhou,215006,China
2.Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology,Changzhou University,Changzhou,213164,China
3.Department of Physics,Hong Kong Baptist University (HKBU),Kowloon,Kowloon Tong,Hong Kong
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Laboratory for Advanced Interface and Materials,Research Centre for Smart Wearable Technology,Institute of Textiles Clothing,The Hong Kong Polytechnic University,Hung Hom,Hong Kong
6.HKBU Institute of Research and Continuing Education,Shenzhen,518000,China
7.Institute of Advanced Materials,State Key Laboratory of Environmental and Biological Analysis,Golden Meditech Centre for NeuroRegeneration Sciences,HKBU,Kowloon,Kowloon Tong,Hong Kong

Zhao，Jie,Sun，Peng,Wu，Zhongwei,et al. Titanium Nanopillar Arrays Functioning as Electron Transporting Layers for Efficient, Anti-Aging Perovskite Solar Cells[J]. Small,2020,17(2).

Zhao，Jie.,Sun，Peng.,Wu，Zhongwei.,Li，Jun.,Wang，Xiaohan.,...&Huang，Zhifeng.(2020).Titanium Nanopillar Arrays Functioning as Electron Transporting Layers for Efficient, Anti-Aging Perovskite Solar Cells.Small,17(2).

Zhao，Jie,et al."Titanium Nanopillar Arrays Functioning as Electron Transporting Layers for Efficient, Anti-Aging Perovskite Solar Cells".Small 17.2(2020).