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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林清富(Ching-Fuh Lin) | |
| dc.contributor.author | Avula Teja | en |
| dc.contributor.author | 德 安 | zh_TW |
| dc.date.accessioned | 2021-07-11T15:33:29Z | - |
| dc.date.available | 2018-08-23 | |
| dc.date.copyright | 2018-08-23 | |
| dc.date.issued | 2018 | |
| dc.date.submitted | 2018-08-16 | |
| dc.identifier.citation | REFERENCES
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Nazeeruddin “Instability in CH3NH3PbI3 perovskite solar cells due to elemental migration and chemical composition changes”. 83. “Degradation of Co-Evaporated Perovskite Thin Film in Air”, Congcong Wang, Youzhen Li, Xuemei Xu, Chenggong Wang, Fangyan Xie, Yongli Gao. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/78974 | - |
| dc.description.abstract | Due to the development of technology and gradual depletion of fossil fuels, the energy issue has received wide attention in this century. The world is giving every effort to develop alternative energy. Solar energy is with inexhaustible source and also environment-friendly that it will not produce greenhouse gases. For these reason, the development of solar cells has become one of the best plan to solve the oncoming shortage of energy. Among many types of solar cells, perovskite solar cells suddenly appear on the horizon and the conversion efficiency has been improved from 3% to 21% in just few years. This makes many teams who originally study in polymer and dye-sensitized solar cells start doing research about perovskite. They apply their former techniques of polymer and dye-sensitized solar cells to perovskite solar cells and also get good results. In addition to high efficiency, perovskite solar cells have other advantages such as large area solar cells potential, possible to fabricate on flexible substrates, lightweight and with multiple applications.
In this research, we developed a new method and a homemade chamber called Sandwich Deposition Technique (SDT). By taking the advantages of double interdiffusion equipped by the PbI2-CH3NH3I-PbI2 structure, the extremely thin seed perovskite layer formed by the PbI2 and CH3NH3I accurately controlled the diffusion of CH3NH3I. In addition, to achieve better crystal quality of perovskite, the heating temperature of CH3NH3I powder was tuned in 3-to-1 process to make the formation of perovskite continuously and completely. we have demonstrated the characteristics of the CH3NH3PbI3 perovskite with thermal annealing at 100℃ for time ranging from 20 to 50 min. The preparation of perovskite films by SDT process is feasible and has certain production advantages. By this method, the diffusion distance and reaction result of MAI particles were effectively controlled, and the perovskite films with larger crystal size and a large reduction in carrier recombination were obtained. The optimum device exhibits outstanding performance, with Jsc=22.88mA/cm2, Voc=0.87V, FF= 74.24 and PCE= 14.93% respectively. But the stability of these devices was very poor. So we modified the SDT process into the Environment Deposition Control (EDC) method to fabricate the perovskite layer. In the literature, we can know that there are many techniques can make the better film of active layer of organic optical devices. They use the casting with the IPA, DMSO on the substrates to slow down the reaction to form a better film. Here, we try to apply the mechanism in the SDT process. Therefore, we put the glass vails with ether solvent inside the chamber directly and we can achieve 14.18%. Even though the PCE is less than our previous results, but it showed tremendous stability even after 7 days. The reason for the less PCE was the 30min formation time was not sufficient to fabricate the perovskite layer, and also the ether solvent turned into vapor very fast. So, we decided to increase the SDT time from 30min to 80min and replace the ether solvent with the CB solvent. The boiling point of CB is very high compared to the ether solvent. The reason for placing the chlorobenzene (CB) solvent in the chamber is CB helps to get large perovskite uniform morphology, so that would be easy for PCBM (ETL) to spread on it and it also helps to maintain the stability of the devices even after some days. The device exhibited good performance, with Jsc = 18.36 mA/cm2, Voc = 0.92V, FF = 75.8% and PCE = 12.81% when it had just been finished for the fabrication. After several days by placing the device in vacuum chamber, the value of PCE and FF increased sharply. The best PCE value was 16.06%, and the best FF value was 83.14%. For a low temperature process under whole atmosphere, this is a breakthrough of the perovskite solar cells and mass production. | en |
| dc.description.provenance | Made available in DSpace on 2021-07-11T15:33:29Z (GMT). No. of bitstreams: 1 ntu-107-R05941108-1.pdf: 6928589 bytes, checksum: 7d327a9305fbfde7ebc70fe10afcc4ab (MD5) Previous issue date: 2018 | en |
| dc.description.tableofcontents | Table of Contents
ACKNOWLEDGEMENT i ABSTRACT ii Table of Contents v List of Figures viii List of Tables xi CHAPTER 1 – INTRODUCTION 1 1.1 Research Background 1 1.2 Literature Review 7 1.2.1 Historical evolution of perovskite solar cells 7 1.2.2 Crystal lattice structure of perovskite solar cells 9 CHAPTER 2 – PRINCIPLES OF SOALR CELLS 13 2.1 Basic Theory of Solar cells 13 2.1.1 Operation Principle of solar cells 13 2.1.2 Impact parameters of solar cells 16 2.2 Technical principle of perovskite Solar cells 19 2.2.1 Working mechanism of perovskite solar cells 19 2.2.2 Preparation methods of perovskite Solar cells 23 2.2.3 Hysteresis and Stability 29 CHAPTER 3 – PREPARATION OF P-I-N PLANAR HETEROJUNCTION PEROVSKITE SOLAR CELLS BY SANDWICH DEPOSITION TECHNIQUE 30 3.1 Introduction to sandwich deposition technique (SDT) 30 3.2 Experiment Details 32 3.2.1 Materials and Characterization 32 3.2.2 Device Fabrication 33 3.3 Results and Discussion 40 3.3.1 Fabricating perovskite layer by SDT process 40 3.3.2 Increasing the post annealing time after forming the perovskite 43 3.4 Conclusion 49 CHAPTER 4 –ENVIRONMENT DEPOSITION CONTROL METHOD TO FABRICATE PEROVSKITE SOLAR CELLS VIA SANDWICH DEPOSITION TECHNIQUE 50 4.1 Introduction to Environment Deposition Control (EDC) method 50 4.2 Experiment Details 53 4.2.1 Materials and Characterization 53 4.2.2 Device Fabrication 55 4.3 Results and Discussion 60 4.3.1 Fabricating perovskite layer by EDC method in SDT process 60 4.4 Conclusion 67 CHAPTER 5 – FABRICATION OF P-I-N PLANAR HETEROJUNCTION PEROVSKITE SOLAR CELLS WITH IMPROVED MORPHOLOGY AND IMPACT OF TIME ON ITS PARAMETERS 68 5.1 Introduction 68 5.2 Experiment Details 70 5.2.1 Materials and Characterization 71 5.2.2 Device Fabrication 72 5.3 Results and Discussion 78 5.3.1 Fabricating perovskite layer by placing the CB in SDT chamber 78 5.4 Conclusion 91 CHAPTER 6 – CONCLUSION AND FUTURE WORK 92 6.1 CONCLUSION 92 6.2 FUTURE WORK 94 PUBLICATIONS 95 REFERENCES 96 | |
| dc.language.iso | en | |
| dc.subject | PEDOT: PSS | zh_TW |
| dc.subject | environment deposition control (EDC) | zh_TW |
| dc.subject | perovskite solar cell | zh_TW |
| dc.subject | sandwich deposition technique (SDT) process | zh_TW |
| dc.subject | double inter diffusion | zh_TW |
| dc.subject | morphology control | zh_TW |
| dc.subject | solvent annealing | zh_TW |
| dc.subject | atmosphere process | zh_TW |
| dc.subject | thermal annealing | zh_TW |
| dc.title | 以三明治鍍膜製作高效率甲基銨錪化鉛鈣鈦礦太陽能電池暨時間對該元件效率的影響 | zh_TW |
| dc.title | FABRICATION OF HIGH EFFICIENCY CH3NH3PbI3 PEROVSKITE SOLAR CELLS BY SANDWICH DEPOSITION TECHNIQUE AND THE IMPACT OF TIME ON EFFICIENCY VARIATION | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 106-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 林恭如(Gong-Ru Lin),黃建璋(Jian-Jang Huang) | |
| dc.subject.keyword | perovskite solar cell,thermal annealing,environment deposition control (EDC),sandwich deposition technique (SDT) process,double inter diffusion,morphology control,solvent annealing,atmosphere process,PEDOT: PSS, | zh_TW |
| dc.relation.page | 104 | |
| dc.identifier.doi | 10.6342/NTU201802536 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2018-08-16 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
| 顯示於系所單位： | 光電工程學研究所 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-107-R05941108-1.pdf 未授權公開取用 | 6.77 MB | Adobe PDF |
系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。