Efficient Electron Transport Layer-Free Perovskite Solar Cells Enabled by Discontinuous Polar Molecular Films: A Story of New Materials and Old Ideas?
文献类型：期刊论文
| 作者 | Huang, Like; Huang, Jiaming; Peng, Ruixiang; Ge, Ziyi |
| 刊名 | ACS SUSTAINABLE CHEMISTRY & ENGINEERING
 |
| 出版日期 | 2021 |
| 卷号 | 9期号:2页码:936-943 |
| 关键词 | PERFORMANCE COVERAGE |
| 英文摘要 | Interests in minimalist device structure design of perovskite solar cells (PSCs) have accelerated the rapid advances of electron transport layer-free PSCs by composition and solvent engineering. For higher device performance, interface engineering regarding effective interface energy level alignment is highly needed. Herein, a polar nonconjugated small-molecule electrolyte (PNSME) inter-layer is inserted into the perovskite/indium tin oxide (ITO) interface to reduce the carrier collection barrier at this interface. By changing the inter-layer thickness, ITO's effective work function and thus the energy level alignment at the perovskite/ITO interface can be continuously controlled. Interestingly, although pinholes are found in all discontinuous inter-layers with varying thicknesses, they hardly affect the uniformity of ITO's local work function distribution. According to the PNSME thickness and coverage, two coexisting mechanisms of interface electron injection are proposed. The interfacial dipoles of the inter-layer are of great significance with respect to electron tunneling through PNSME with a typical quantum mechanical tunneling thickness limit of similar to 10 nm, whereas electron transmission through the thick inter-layer (>= 10 nm) is dominated by the direct perovskite/ITO contact at the pinhole area. This work provides novel insights on the work principle of PSCs and highlights the importance of interface engineering of perovskite/ITO contact toward efficient and simple-structured PSCs. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/22279]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | 1.Ge, ZY (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 2.Huang, LK (corresponding author), Ningbo Univ, Dept Microelect Sci & Engn, Sch Phys Sci & Technol, Ningbo 315211, Zhejiang, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Huang, Like,Huang, Jiaming,Peng, Ruixiang,et al. Efficient Electron Transport Layer-Free Perovskite Solar Cells Enabled by Discontinuous Polar Molecular Films: A Story of New Materials and Old Ideas?[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2021,9(2):936-943. |
| APA | Huang, Like,Huang, Jiaming,Peng, Ruixiang,&Ge, Ziyi.(2021).Efficient Electron Transport Layer-Free Perovskite Solar Cells Enabled by Discontinuous Polar Molecular Films: A Story of New Materials and Old Ideas?.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,9(2),936-943. |
| MLA | Huang, Like,et al."Efficient Electron Transport Layer-Free Perovskite Solar Cells Enabled by Discontinuous Polar Molecular Films: A Story of New Materials and Old Ideas?".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 9.2(2021):936-943. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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