DGIST Scholar: High-performance ternary organic solar cells with controllerable morphology based on two acceptors processed with non-halogenated solvent

Department of Energy Science and Engineering Theses Master

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High-performance ternary organic solar cells with controllerable morphology based on two acceptors processed with non-halogenated solvent

Title: High-performance ternary organic solar cells with controllerable morphology based on two acceptors processed with non-halogenated solvent

Subject: Ternary organic solar cell, Complementary absorption spectra, Cascade energy level structure, Non-halogenated solvent, 삼성분계 유기태양전지, 상보적 흡수 스펙트럼, 계단식 에너지 레벨 구조, 비할로겐 용매

Table Of Contents: I. INTRODUCTION 1
II. THEORICAL BACKGROUND 4
2.1 Organic Solar Cell (OSC) 4
2.1.1 Basic principles and operation of organic solar cell 6
2.1.2 Photovoltaic parameters of organic solar cells 7
2.1.2.1 Open circuit voltage (Voc) 8
2.1.2.2 Short circuit current (Isc) 8
2.1.2.3 Fill factor (FF) 9

2.2 Ternary Organic Solar Cell (Ternary OSC) 10
2.2.1 Charge transport mechanism in ternary organic solar cell 12
2.2.2 The role of the third component 15
2.2.3 Fullerene-derivatives as the third components in non-fullerene binary systems 16
2.2.4 Charge recombination and nanomorphology in ternary OSCs 18

2.3 Non-halogenated solvent 19

IIII. EXPERIMENTAL 21
3.1 Solution preparation 21
3.1.1 Chemicals and Materials 21
3.1.2 Solution preparation 21
3.2 Fabrication of Device 22
3.2.1 Fabrication of binary and ternary device 22
3.2.2 Fabrication of Electron-only device 23
3.2.3 Fabrication of hole-only device 23
3.3 Measurement 24

IV. RESULT & DISCUSSION 25
4.1 Optical properties 25
4.2 Device optimization 28
4.3 External Quantum Efficiency (EQE) measurement 33
4.4 Charge recombination properties 34
4.5 Charge transport properties 36
4.6 Film morphology 38

V. CONCLUSION 40
REFERENCES 42
SUMMARY 46