@phdthesis{oai:kyutech.repo.nii.ac.jp:00006302,
 author = {張,  普濤 and Zhang,  Putao},
 month = {2020-01-06},
 note = {1. Introduction||2. Study the effect of PbI2 passivation on carbon electrode for perovskite solar cells by quartz crystal microbalance system||3. Performance enhancement of mesoporous TiO2-based perovskite solar cells by SbI3 interfacial modification layer||4. Nb2O5 surface passivation for enhanced performance of ZnO based perovskite solar cells||5. Preparation of perovskite films under liquid nitrogen atmosphere for high efficiency perovskite solar cells, Recently, perovskite solar cells （PSCs） have got much attention due to their high efficiency and low-cost fabrication. Within the last ten years, they have shown a sharp rise in efficiency from initial 3.8% to over 24% thus enabling them the most promising upcoming new generation solar cells. But, the bottom neck of PSCs lie in the prospect of commercialization, such as industry standard stability and further reduction of manufacturing cost. Nevertheless, the perovskite film quality has a great influence on the working stability of the PSCs. Therefore, in this thesis, we focus to enhance the stability of perovskite-based devices by controlling the morphology and utilizing the interface passivation strategy. The main research contents are as follows:  In chapter 1, development history of photovoltaic technology and the classification of solar cells have been introduced. In addition, the working principle of PSCs, the current challenges and the purpose of this thesis have been described. In chapter 2, we demonstrate the fabrication of a triple layer mesoscopic carbon-based PSC. The carbon electrode was pre-passivated with PbI2. The results showed that PbI2 was strongly adsorbed on carbon surface following reaction with -OH on the carbon surface to form a C-O-Pb bond. Since the PbI2 passivation layer effectively reduces carrier recombination, the JSC and VOC were improved in the carbon electrode based passivated solar cell. In chapter 3, the mesoporous TiO2 substrates were immersed in a certain concentration of SbI3/DMF solution to passivate the TiO2 surface. The results of QCM and XPS indicate that SbI3 molecules were successfully introduced onto TiO2 surface, and the passivation layer consisting of Ti-O-Sb bond was formed. The SbI3 passivation layer effectively reduced the trap density of TiO2, thereby carrier recombination was suppressed efficiently. Compared with the control device, the SbI3 modified solar cell show much enhanced efficiency and 80% of the initial efficiency was maintained in the air under environment exposure after 60 days. In chapter 4, the ZnO ETL was prepared by a low temperature solution process, and Nb2O5 was spin-coated on the top of ZnO. The Nb2O5 passivation layer effectively avoids the contact of perovskite and ZnO, therefore the perovskite film stability was enhanced. The results showed that after the introduction of Nb2O5 passivation layer stability of perovskite was enhanced and cell efficiency reached up to 14.57%. In chapter 5, high-quality perovskite films were prepared by liquid nitrogen assisted method. The perovskite film obtained by this method was having high-quality with dense crystal grains and pinhole free. Fabricated devices with the high-quality perovskite film showed a PCE of 16.53%. The photoconversion efficiency performance remained above 89% of initial PCE following one month of storage in a desiccator at room temperature. Finally, the conclusions and prospects are presented. Perovskite solar cells are facing significant challenges in terms of long-term stability and production costs. It would have great significance to further study preparation of PSCs in the air environment., 九州工業大学博士学位論文 学位記番号:生工博甲第354号 学位授与年月日:令和元年9月20日, 令和元年度},
 school = {九州工業大学},
 title = {Study of Interface Modification and Perovskite Surface Morphology Control in Perovskite Solar Cells},
 year = {}
}