Flexible single-wall carbon nanotube electrodes for dye-sensitized solar cells
Flexible single-wall carbon nanotube electrodes for dye-sensitized solar cells
- 주제(키워드) carbon nanotube , dye-sensitized solar cell , flexible solar cell , transparent electrode
- 발행기관 아주대학교
- 지도교수 이순일
- 발행년도 2016
- 학위수여년월 2016. 2
- 학위명 박사
- 학과 및 전공 일반대학원 에너지시스템학과
- 실제URI http://www.dcollection.net/handler/ajou/000000022146
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
For developing marketable flexible solar cells, it is necessary to develop flexible transparent electrodes with properties that are not affected by repeated bending. As such, for developing commercially viable high-efficiency flexible DSSCs, there is a need to develop effective heat treatment techniques that can be applied to flexible substrates, as well as flexible transparent electrodes that are affordable, durable, and corrosion-resistant. In this research, SWCNT thin films used in photo-electrodes and counter-electrodes of DSSCs were prepared by depositing water-dispersed SWCNTs over a glass or flexible plastic substrates by using a spray method. First of all, we combined spray-coating of aqueous dispersion solution of SWCNTs with chemical reduction of Pt precursor to fabricate fully solution-processed CEs. Because the solution processing was conducted entirely at low temperatures (< 150 C) our new CE-fabrication method that utilizes formic acid as a reduction agent is compatible with common electronics-grade plastic substrates, thereby lending potential for large-scale production at low cost In addition, in this study developed a simple and effective rapid heat treatment process for TiO2 photo-electrodes by using a 2.45 GHz variable-output microwave oven built by modifying a commercial off-the-shelf product and simple holder. We successfully fabricated DSSCs less than 8 min using rapid heating method, comparable to conventional annealing process. This new strategy was also attempted in order to prepare SWCNT thin film transparent electrode of PEs, using TiO2 blocking layer made by combining with TiO2 sol solution and micro-wave sintering in Anisole solution.
more목차
Chapter 1. Introduction and theoretical background 1
1.1. Thesis Overview 1
1.2. Dye-sensitized Solar Cells (DSSCs) 3
1.2.1. Introduction of DSSCs 3
1.2.2. Flexible DSSCs 6
1.3. Single-Wall Carbon Nanotubes (SWCNTs) 8
1.3.1 Introduction of Carbon Nanotubes 8
1.3.2. The theory of CNTs 9
1.3.3 Properties of carbon nanotube 12
1.4. Micro-wave rapid heating 14
1.5. Outline for this thesis 14
1.6. Reference 16
Chapter 2. SWCNT Thin film electrodes 19
2.1. Experimental material 19
2.2. SWCNT dispersion and thin film electrode fabrication 19
2.3. Flexible SWCNT thin films with platinum nano-particles 28
2.3.1. Introduction 28
2.3.2. The decoration of Pt NPs on SWCNT thin films 29
2.3.3. The characteristic of SWCNT thin films decorated Pt NPs 30
2.4. Conclusion 51
2.5. Reference 51
Chapter 3. DSSCs made by SWCNT-Pt NPs CE 53
3.1. Introduction 53
3.2. Experimental section 56
3.3. Result and discussion 59
3.4. Conclusion 71
3.5. Reference 72
Chapter 4. A micro-wave rapid heating for PEs of DSSCs 77
4.1. Introduction 77
4.2. Experimental section 82
4.2.1. Materials and equipment 82
4.2.2. Fabrication of Photo-Electrodes (PEs) 83
4.2.3. Fabrication of DSSCs and Characteristic 84
4.3. Result and discussion 85
4.4. Conclusion 101
4.5. Reference 102
Chapter 5. A micro-wave heating process for TiO2 blocking layer/SWCNT transparent electrodes of PEs of DSSCs 105
5.1. Introduction 105
5.2. Experimental section 106
5.3. Results and discussion 108
5.4. Conclusion 105
Chapter 6. Conclusions and future work 116
Publication List 119
