High Performance Organometal Halide Perovskite Solar Cell Prepared by Controlling Solvent Evaporation
- 주제(키워드) Perovskite , Hybrid solar cell , Energy materials.
- 발행기관 아주대학교
- 지도교수 Hyung-Taek Kim
- 발행년도 2015
- 학위수여년월 2015. 8
- 학위명 석사
- 학과 및 전공 일반대학원 에너지시스템학과
- 실제URI http://www.dcollection.net/handler/ajou/000000020283
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
As a serious raising candidate, the Organo-metal halide Perovskite (MAPbX3: X=I,Cl,Br) solar cells are become greater promising for thin film photovoltaic with power conversion efficiencies 20% has already exceed. On account of higher power conversion efficiency, the hybrid Perovskite materials came into sight particularly promising for future solar cell. Due to organic base materials solar cell, to date the highest efficiencies have been obtained mainly lead halide base hybrid Perovskite materials by using various methodologies. Here, we reported printed based Perovskite solar cells with voltage, current density, fill factor and efficiency are 0.985V, 22.305 mA/cm2, 62.5% and 13.72% respectively which achieved at forward scan. This was enabled by the growth of CH3NH3PbI3 layer with a controlled morphology via a Methyl Ammonium Iodide solution by controlling the solvent evaporation. Printing of a solution of CH3NH3I with different concentrations follows the spin-coating of PbI2 where crystal growth and the morphology of CH3NH3PbI3 is found to strongly depend on the different temperature and solvent evaporation time. Overall, we achieved from methyl ammonium Iodide printed perovskite solar cell the average power conversion efficiency 14.89% with a photocurrent density of 22.2645 mA/cm2, open circuit voltage 0.9875V and fill factor about 67% under a standard illumination of 100mW per square centimeter. Further improvement is expected for this material by applying printed method for controlling the solvent evaporation in terms of understanding charge build up and transport properties of printed devices. Organo-lead halide perovskite is now concern as a fast promoted, leading and great potential solar cell material and a beginning new window in solar cell research.
more목차
List of Text
Page No.
Chapter 1 Introduction 1
1.1Photovoltaic Energy Situation 1
1.2 Overview on Solar Cell Technologies 4
1.3 Solar Energy 6
1.4 Economics of Solar Energy 6
1.5 Basic Theory of Photovoltaics Cells 7
1.6 Photovoltaic Cell Performance in Lab Scale 8
1.7 The Challenge of Perovskite Solar Cell 10
1.8 Aims and Objective of the Thesis 10
Reference 11
Chapter 2 Theory 12
2.1 Organic Photovoltaics 12
2.1.1 Light absorption and excitons generation 13
2.1.2 Exciton Diffusion 13
2.1.3 Exciton Dissociation 14
2.1.4 Charge Transport 15
2.2 DSSC to Perovskite Based MSSC 15
2.2.1 Dye Sensitized Solar Cell (DSSC) 15
2.2.2 Operating Principle of Perovskite based MSSC 18
2.3 Characterization of Solar cell 19
2.4 Development of lifetimes and efficiencies 23
Reference 24
Chapter 3 Experiment 25
3.1 Materials 25
3.1.1 Active layers 26
3.1.2 Electron Transporting Layer 27
3.1.3 Mesoporous scaffold TiO2 28
3.1.4 Spiro-OMeTAD as Hole transporting Layer 29
3.1.5 Gold as Back Electrode 30
3.2 Instrumental 31
3.3 Fabrication Tools 31
3.3.1 Spin Coater machine 31
3.3.2 Magnetic stirrer machine 32
3.3.3 Ultrasonic Bath Cleaner 32
3.3.4 Annealing Chamber 33
3.3.5 Weighing Machine 34
3.3.6 Glove box 34
3.3.7 Electron Beam Evaporator 35
3.4 Device Fabrication Process 35
3.4.1 Device Structure 36
3.4.2 Fabrication process flow 36
3.4.3 Device preparation 38
3.5 Condition table of experiment 41
3.6 Difficulties 42
3.7 Characterization 42
Reference 43
Chapter 4 Results and Analysis 44
4.1 MSSC based Perovskite Planar cell as Reference cell 44
4.2 Study of MAI Printed Perovskite Active Layer 46
4.3 Final Results 54
4.4 Study of Best Devices 59
4.5 Analysis 66
Chapter 5 Conclusion 67
Abbreviations 68
Biography 70
