Title

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

Alternative Title

비할로겐 용매 하에서 두 개의 억셉터 기반 몰폴로지 조절이 가능한 고성능 삼성분계 유기태양전지

DGIST Authors

Gyeonghwa Yu ; Youngu Lee ; Dae-Hwan Kim

Advisor

이윤구

Co-Advisor(s)

Dae-Hwan Kim

Issued Date

2021

Awarded Date

2021/02

Citation

Gyeonghwa Yu. (2021). High-performance ternary organic solar cells with controllerable morphology based on two acceptors processed with non-halogenated solvent. doi: 10.22677/thesis.200000365022

Type

Thesis

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

URI

http://dgist.dcollection.net/common/orgView/200000365022
http://hdl.handle.net/20.500.11750/16714

DOI

10.22677/thesis.200000365022

Degree

Master

Department

Energy Science & Engineering

Publisher

DGIST

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