中文题名: | 基于新型空穴传输材料的钙钛矿太阳电池 |
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保密级别: | 公开 |
论文语种: | 中文 |
学科代码: | 070305 |
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学生类型: | 硕士 |
学位: | 理学硕士 |
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学位年度: | 2018 |
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研究方向: | 钙钛矿太阳电池 |
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提交日期: | 2018-06-01 |
答辩日期: | 2018-05-18 |
外文题名: | PEROVSKITE SOLAR CELLS BASED ON A NOVEL HOLE TRANSPORT MATERIAL |
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中文摘要: |
随着能源问题的日益严峻,促进了太阳电池日新月异的发展,不仅传统工艺的太阳电池发展迅猛,有机-无机杂化钙钛矿太阳电池以其优异的光电性能,如激子束缚能小,载流子迁移率高,吸光范围宽,激子扩散长度长等等,在不到十年的时间内取得快速发展,光电转化效率已经突破22%,成为现今发展最快的太阳电池。本文将一种小分子化合物(hexakis[4-(N,N-di-p-methoxy- phenylamino)phenyl]benzene, F-1)作为新型的空穴传输材料替代spiro-OMeTAD(2,2?,7,7?-tetrakis(N,N-di-pmethoxy- phenylamine)-9,9?-spirobifluorene)用于制备钙钛矿太阳电池。利用紫外吸收光谱、热重分析和差示扫描量热法对F-1进行表征发现其具有良好的热稳定性以及与钙钛矿材料相匹配的光学性质。而通过紫外光电子能谱测得F-1的HOMO能级为-5.31 eV,比spiro-OMeTAD的HOMO能级-5.11 eV更深,意味着与钙钛矿材料的能级更加匹配。另外,通过空间电荷限制电流法测试计算得到F-1的空穴迁移率为4.98 × 10-4 cm2 V-1 s-1,是spiro-OMeTAD的两倍多,表明与spiro-OMeTAD相比,F-1具有更好的空穴传输性能。在制备基于MAPbIxCl3-x和(FAPbI3)0.85(MAPbBr3)0.15两种不同钙钛矿材料的太阳电池过程中,将F-1作为空穴传输材料时分别获得了17.73%和19.04%的光电转化效率,明显高于使用传统的空穴传输材料spiro-OMeTAD制得的电池。以上结果表明鉴于F-1所具有的较好的本征特性,它有可能替代spiro-OMeTAD用于高效稳定钙钛矿太阳电池的制备。
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外文摘要: |
With energy problem becomes more and more serious, the research of solar cells becomes more and more significant in the future. As one of the most important solar cells, organic-inorganic hybrid perovskite solar cells (PSCs) have attracted more and more attentions, since the power conversion efficiency (PCE) has been boosted over 22% in less than a decade. Due to its excellent photoelectric properties, such as small exciton binding energy, high carrier mobility, wide absorption range and long exciton diffusion length, etc., PSCs rank above other solar cells. Hole transport layer (HTL) is the key component to construct PSCs, therefore improved efficiency can be achieved via optimizing the HTL. In this thesis, a small molecular hexakis[4-(N,N-di-p- methoxyphenylamino)phenyl]benzene (F-1) was successfully synthesized using a modified method as previously reported and used as a novel hole transport material (HTM) in the fabrication of PSCs. As revealed UV-vis absorption spectroscopy, thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC), F-1 exhibited suitable optical properties and good thermal stability. The electrochemical property of F-1 was studied by Ultraviolet photoelectron spectroscopy (UPS). The HOMO energy level (EHOMO) of F-1 was calculated to be -5.31 eV which was deeper than that of spiro-OMeTAD, suggesting that the EHOMO of F-1 matched better with perovskite material. Furthermore, the space charge limitation of current (SCLC) method was applied to study the hole transport properties of F-1 and the hole mobility of F-1 was determined to be 4.98 × 10-4 cm2 V-1 s-1, which is two times higher than that of spiro-OMeTAD, indicating that F-1 possesses better hole transport property. Using F-1 as HTM to fabricate PSCs based on MAPbIxCl3-x and (FAPbI3)0.85(MAPbBr3)0.15 gave the power conversion efficiencies (PCEs) of 17.73% and 19.04%, respectively, higher than spiro-OMeTAD based PSCs. All the results demonstrate that F-1 has the potential as an excellent HTM to replace spiro-OMeTAD for the fabrication of highperformance PSCs.
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参考文献总数: | 86 |
馆藏号: | 硕070305/18002 |
开放日期: | 2019-07-09 |