标题: | 以阵列型介观TiO2奈米结构为基础之钙钛矿太阳能电池研究 Perovskite Solar Cells Based on Organized Mesoscopic Tio2 Nanostructures |
作者: | 刁维光 国立交通大学应用化学系(所) |
关键字: | 太阳能电池;钙钛矿;阵列介孔材料;交流阻抗分析;瞬态吸收光谱 ;solar cell;perovskites;organized mesoporous materials;impedance spectroscopy;transient absorption spectroscopy |
公开日期: | 2014 |
摘要: | 有机-无机混成有机金属卤化物钙钛矿(perovskite)具有1.5 eV的直接能隙、低激子束缚能、扩散路径长、宽广的光学吸收范围 (400-800 nm)以及高吸光系数等优点,使得钙钛矿成为薄膜太阳能电池的最佳吸光材料,而其元件光电转换效率更高达15 %以上,创造了溶液制程薄膜太阳能电池的新纪元。由于钙钛矿具有双极性的传导性质,其除了做为太阳能电池主要的光吸收材料之外也可以作为电子或电洞的传输层,这个特性使得钙钛矿元件结构的设计呈现多样化的优势;例如,钙钛矿/电洞传输层的设计可作为一种p-type电极以利于电洞的注入而产生电荷分离,此时钙钛矿作为光吸收层与电子传输媒介;相反地,钙钛矿/电子传输层的设计可作为一种n-type电极而产生有效的电荷分离接面,钙钛矿因此可以扮演光吸收层与电洞导体的双重角色。目前最成功的元件结构为n-type金属氧化物(TiO2)/钙钛矿/电洞传输材料(Spiro-OMeTAD)的介观异质接面或平面异质接面,TiO2层作为钙钛矿的骨架(Scaffold)并可传输电子,因此多孔性的TiO2材料在电池结构上具有非常重要的地位,在此我们提出这个台韩合作研究计画“以阵列型介观TiO2奈米结构为基础之钙钛矿太阳能电池研究”,其目的在结合双方之技术与资源,利用高分子聚合合成出接枝高分子并作为基材模板,并进一步开发出新颖形貌且具有高孔洞性的介观无机奈米材料并应用于钙钛矿薄膜太阳能电池。这些技术的开发包括了钙钛矿晶体的合成与高孔洞性的介观无机奈米材料的制备、元件的组装与效能量测、瞬态光电动力学量测与电化学交流阻抗分析、以及能量转换与电子转移的基础研究。本计画之钙钛矿的合成、元件的制备与测试以及相关光谱动力学的研究将在台湾进行,而高分子合成及阵列型具有介观孔洞且高孔隙率的无机奈米材料则由韩国团队负责,这个国际合作研究计画将会有非常丰硕的成果产出。 Organic-inorganic hybrid metal halide perovskites have the advantages of direct band gap of 1.5 eV, low excitonic binding energy, large diffusion length, broad light-absorption region and high absorption coefficient, so that perovskites become the best light harvesting materials with reported power conversion efficiencies exceeding 15 % for the next generation thin-film solar cells based on solution processing reaching a new milestone. The bipolar charge transport feature makes perovskite itself acting as a transporter of electrons or holes after charge separation. For example, the perovskite/HTM layers can be served as a p-type electrode while the perovskite/ETM layers can be served as an n-type electrode to design a suitable device configuration. The most successful n-type perovskite solar cells have a device configuration TiO2/perovskite/spiro-OMeTAD, for which TiO2 layer is served as scaffold for perovskite at the same time as an electron transporting medium. Therefore, mesoporous TiO2 layer plays an important role to affect the device performance for a perovskite solar cell. As a consequence, we propose herein the Taiwan-Korea joint proposal with the title “Perovskite Solar Cells based on Organized Mesoscopic TiO2 Nanostructures”. The goal of this proposal is to combine the resources and the techniques of both sides and to make a big breakthrough on the development of a new type of perovskite solar cells. The approach is to use the polymerization technique to synthesis the graft co-polymers as templates so that organized mesoporous TiO2 films can be produced with high porosity that is suitable for loading sufficient perovskite crystals to enhance the light-harvesting and electron transporting ability of the devices. The development of the techniques in this proposal include synthesis of perovskite crystals, device fabrication and characterization, transient photoelectric decays and electrochemical impedance spectroscopy. Time-resolved spectral experiments will also be carried out in order to understand the fundamental operational principle for this type of solar cells. The YSU team of Korea will be in charge for the development of polymer synthesis and the organized mesoporous TiO2 materials with high porosity and the NCTU team of Taiwan will develop the synthesis of perovskites, devices fabrication, and the corresponding characterizations. We anticipate that a fruitful outcome will result by executing this joint proposal. |
官方说明文件#: | MOST103-2923-M009-005-MY2 |
URI: | https://www.grb.gov.tw/search/planDetail?id=8391683&docId=450462 http://hdl.handle.net/11536/132067 |
显示于类别: | Research Plans |