量子点敏化P型NiO太阳能电池的构筑及性能研究

发布时间：2018-05-01 12:17

  本文选题：P型 + 量子点敏化太阳能电池　； 参考：《河北大学》2017年硕士论文

【摘要】：量子点敏化太阳能电池(QDSSCs)作为染料敏化太阳能电池(DSSCs)的衍生物,因具有低廉的价格、简单易操作的制备工艺、高的理论转换效率等优势,受到极大的关注。目前N型半导体氧化物作为光阳极的研究已经相对成熟,人们开始研究P型半导体氧化物,其具有较宽带隙、合适的价带位置等特点,对于P-N型叠层敏化太阳能电池发展和应用具有重要的意义。氧化镍(NiO)由于具有良好的稳定性以及传导性等优点,是一种应用最广泛的P型半导体氧化物。然而,对于P型QDSSCs的制备材料及其光电性能研究还不够深入。本文采用两种方法制备出不同形貌的NiO,并以量子点(QDs)敏化NiO作为光阴极组装成电池,从材料的合成、电池的光电性能等方面对其进行研究。首先,采用水热法以及均相沉积法分别制备出海胆状和花状NiO,并研究了不同制备条件对海胆状NiO形貌的影响。研究发现,在4~16 h范围内,随着反应时间的增加,NiO的形貌由不均匀的海胆状逐渐变成粒度尺寸分布均匀的海胆状,然后逐渐变成球状,最后产生不成形的沉淀物。在80°C~120°C范围内,温度对NiO的形貌影响不大。其次,采用化学浴沉积法(CBD)制备出PbS敏化海胆状NiO作为光阴极组装成电池,并研究不同形貌NiO、NiO膜厚、PbS沉积次数对电池光电性能的影响。通过对样品的材料表征分析发现,PbS均匀地沉积在NiO薄膜表面,当沉积次数分别为4次时,样品的光吸收能力最强。通过对电池的光电性能表征分析发现,海胆状NiO在120°C下反应8 h时,形貌最好。当NiO膜厚约为3μm,Pb S沉积次数为3次时,电池的效率最大可达1.07%,IPCE值最大可达到50%。最后,采用CBD制备出CdSe敏化花状NiO作为光阴极组装成电池,并研究CdSe沉积次数对电池光电性能的影响。通过对样品的材料表征分析发现,CdSe与NiO良好的链接在一起,均匀地沉积在NiO薄膜表面。当沉积次数为10次时,样品的光吸收能力最强。通过对电池的光电性能表征分析发现,当CdSe沉积次数为8次时,电池的效率最高,达到1.06%。IPCE大约为40%。对NiS和Pt电极进行EIS测试,可知NiS比Pt对电极能够更快地催化氧化还原电对的循环再生。
[Abstract]:As a derivative of dyestuff sensitized solar cell, quantum dot sensitized solar cell (QDS-SCs) has attracted much attention for its advantages of low cost, simple and easy to operate preparation process, high theoretical conversion efficiency and so on. At present, the study of N-type semiconductor oxide as photoanode has been relatively mature. People began to study P-type semiconductor oxide, which has the characteristics of wide band gap, suitable valence band position, and so on. It is of great significance for the development and application of P-N laminated solar cells. Nickel oxide nio (nio) is one of the most widely used P type semiconductor oxides due to its good stability and conductivity. However, the preparation and optoelectronic properties of P-type QDSSCs are not well studied. In this paper, different morphologies of nio were prepared by two methods, and the NiO sensitized by quantum dots was used as photocathode to assemble the battery. The synthesis of materials and the photoelectric properties of the battery were studied. Firstly, sea urchin and flower-like nio were prepared by hydrothermal method and homogeneous deposition method, and the effects of different preparation conditions on the morphology of sea urchin NiO were studied. It was found that the morphology of nio changed from non-uniform sea urchin shape to sea urchin shape with the increase of reaction time in the range of 4 ~ 16 h. Temperature has little effect on the morphology of NiO in the range of 80 掳C ~ 120 掳C. Secondly, PbS sensitized sea urchin (NiO) was prepared by chemical bath deposition (CBD) as photocathode, and the effect of thickness of nio film on the photovoltaic properties of the battery was studied. It is found that PBS is uniformly deposited on the surface of NiO thin films through the analysis of the material characterization. When the deposition times are 4 times respectively, the optical absorption ability of the samples is the strongest. It was found that the morphology of sea urchin NiO was the best when it reacted at 120 掳C for 8 h. When the thickness of NiO film is about 3 渭 m PbS deposition times is 3 times, the maximum efficiency of the battery can reach 1.07% and the maximum value of IPCE can reach 50%. Finally, CBD was used to fabricate CdSe sensitized NiO as photocathode, and the effect of the number of CdSe deposition times on the photovoltaic performance of the battery was studied. It was found that CdSe was well linked to NiO and deposited uniformly on the surface of NiO thin films. When the deposition times are 10 times, the photoabsorption ability of the sample is the highest. It is found that when the number of CdSe deposition is 8 times, the efficiency of the battery is the highest, and the 1.06%.IPCE is about 40%. The EIS measurements of NiS and Pt electrodes show that NiS can catalyze the regeneration of redox pairs faster than that of Pt electrodes.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM914.4

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