Conventional and Inverted Photovoltaic Cells Fabricated Using New Conjugated Polymer Comprising Fluorinated Benzotriazole and Benzodithiophene Derivative
Conventional and Inverted Photovoltaic Cells Fabricated Using New Conjugated Polymer Comprising Fluorinated Benzotriazole and Benzodithiophene Derivative
Ji-Hoon Kim(Department of Chemistry, and Chemistry Institute for Functional Materials, Pusan National University); 송창은(한국과학기술원); 강인남(가톨릭대학교); 신원석(한국화학연구원); Zhi-Guo Zhang(Beijing National Laboratory for Molecular Sciences and Key Laboratory of Organic Solids); Yongfang Li(Beijing National Laboratory for Molecular Sciences and Key Laboratory of Organic Solids); 황도훈(부산대학교)
35권 5호, 1356~1364쪽
초록
A new conjugated copolymer, poly{4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′]dithiophene-alt-4,7- bis(5-thiophen-2-yl)-5,6-difluoro-2-(heptadecan-9-yl)-2H-benzo[d][1,2,3]triazole} (PTIPSBDT–DFDTBTz), is synthesized by Stille coupling polycondensation. The synthesized polymer has a band gap energy of 1.9 eV, and it absorbs light in the range 300–610 nm. The hole mobility of a solution-processed organic thin-film transistor fabricated using PTIPSBDT–DFDTBTz is 3.8 × 10−3 cm2 V−1 s−1. Bulk heterojunction photovoltaic cells are fabricated, with a conventional device structure of ITO/PEDOT:PSS/polymer:PC71BM/Ca/Al (PC71BM = [6,6]-phenyl-C71-butyric acid methyl ester); the device shows a power conversion efficiency (PCE) of 2.86% with an open-circuit voltage (Voc) of 0.85 V, a short-circuit current density (Jsc) of 7.60 mA cm−2, and a fill factor (FF) of 0.44. Inverted photovoltaic cells with the structure ITO/ethoxylated polyethlyenimine/ polymer:PC71BM/MoO3/Ag are also fabricated; the device exhibits a maximum PCE of 2.92%, with a Voc of 0.89 V, a Jsc of 6.81 mA cm−2, and an FF of 0.48.
Abstract
A new conjugated copolymer, poly{4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b′]dithiophene-alt-4,7- bis(5-thiophen-2-yl)-5,6-difluoro-2-(heptadecan-9-yl)-2H-benzo[d][1,2,3]triazole} (PTIPSBDT–DFDTBTz), is synthesized by Stille coupling polycondensation. The synthesized polymer has a band gap energy of 1.9 eV, and it absorbs light in the range 300–610 nm. The hole mobility of a solution-processed organic thin-film transistor fabricated using PTIPSBDT–DFDTBTz is 3.8 × 10−3 cm2 V−1 s−1. Bulk heterojunction photovoltaic cells are fabricated, with a conventional device structure of ITO/PEDOT:PSS/polymer:PC71BM/Ca/Al (PC71BM = [6,6]-phenyl-C71-butyric acid methyl ester); the device shows a power conversion efficiency (PCE) of 2.86% with an open-circuit voltage (Voc) of 0.85 V, a short-circuit current density (Jsc) of 7.60 mA cm−2, and a fill factor (FF) of 0.44. Inverted photovoltaic cells with the structure ITO/ethoxylated polyethlyenimine/ polymer:PC71BM/MoO3/Ag are also fabricated; the device exhibits a maximum PCE of 2.92%, with a Voc of 0.89 V, a Jsc of 6.81 mA cm−2, and an FF of 0.48.
- 발행기관:
- 대한화학회
- 분류:
- 화학