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2-thiophene-benzotriazole-based polymer materials and photovoltaic application thereof

A polymer material, benzotriazole technology, applied in the field of polydithiophene benzotriazole materials, can solve the problem of low efficiency

Inactive Publication Date: 2011-01-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, recently, Levent Toppare et al. replaced the N-H bond of 1,2,3-benzotriazole with dodecyl, and then modified the 4,7 positions of 1,2,3-benzotriazole with 3-hexylthiophene. , and finally a polybenzotriazole photovoltaic material was obtained by electrochemical polymerization. The absorption of sunlight by this photovoltaic material is mainly concentrated at 300-600nm, and the open circuit voltage of the prepared solar cell is as high as 0.85V. However, the efficiency of this polymer is relatively Low, only 0.3% [Derya Baran, Abidin Balan, Selin Celebi, Beatriz Meana Esteban, Helmut Neugebauer, N. Serdar Sariciftci, Levent Toppare. Chemistry of materials. 2010, DOI: 10.1021 / cm100372t]

Method used

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  • 2-thiophene-benzotriazole-based polymer materials and photovoltaic application thereof
  • 2-thiophene-benzotriazole-based polymer materials and photovoltaic application thereof
  • 2-thiophene-benzotriazole-based polymer materials and photovoltaic application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of polymer solar cell device

[0032] 5mg of PCzDTBTz with 10mg of C 60 Mix, add 0.25mL o-dichlorobenzene to dissolve, prepare a layer of about 74nm thick film on the conductive glass modified by PEDOT:PSS by spin coating, and then use aluminum to prepare on the polymer by vacuum evaporation metal electrodes. Its device performance is as follows:

[0033] Short circuit current=5.33mA / cm 2 ; Open circuit voltage = 0.92V; Fill factor = 44%;

[0034] Simulated sunlight (A.M.1.5, 100mW / cm 2 ) under the energy conversion efficiency = 2.2%.

Embodiment 2

[0035] Embodiment 2: Replace PCzDTBTz with PBDTDTBTz as the working medium, and the remaining conditions are the same as in Embodiment 1. Its device performance is as follows:

[0036] Short circuit current=4.5mA / cm 2 ; Open circuit voltage = 0.61V; Fill factor = 62%;

[0037] Simulated sunlight (A.M.1.5, 100mW / cm 2 ) under the energy conversion efficiency = 1.7%.

Embodiment 3

[0038] Embodiment 3: use MOPPV-DTBTz or DOPPV-DTBTz instead of PCzDTBTz as the working medium, and other conditions are the same as in Embodiment 1. The performance of the device is as follows:

[0039] MOPPV-DTBTz:

[0040] Short circuit current=2.38mA / cm 2 ; Open circuit voltage = 0.5V; Fill factor = 31%;

[0041] Simulated sunlight (A.M.1.5, 100mW / cm 2 ) under the energy conversion efficiency = 0.36%.

[0042] DOPPV-DTBTz:

[0043] Short circuit current=2.22mA / cm 2 ; Open circuit voltage = 0.6V; Fill factor = 31%;

[0044] Simulated sunlight (A.M.1.5, 100mW / cm 2 ) under energy conversion efficiency = 0.4%.

[0045] A series of polybenzotriazole materials provided by the invention have good processability, and have been proved to have good photoelectric conversion characteristics through preliminary attempts, and have broad application prospects as the working medium of polymer solar cells.

[0046] The preparation method of a series of polybenzotriazole derivative ma...

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Abstract

The invention discloses a series of 2-thiophene-benzotriazole-based polymer materials. In the invention, a 2-thiophene-benzotriazole unit is connected with another aromatic ring, aromatic heterocyclic ring or derivatives thereof by a carbon-carbon single bond or a carbon-carbon double bond to obtain the 2-thiophene-benzotriazole-based polymer materials. The series of 2-thiophene-benzotriazole-based polymer materials are applied to polymer solar cells and have good photoelectric conversion function. The application of the 2-thiophene-benzotriazole-based polymer materials has the following steps of: mixing the 2-thiophene-benzotriazole-based polymer materials with a C60 receptor; spreading on ITO (Indium Tin Oxide) glass to form a layer of semitransparent film; and finally evaporating a metal electrode on the polymers in a vacuum evaporating way to obtain a polymer solar cell device.

Description

technical field [0001] The invention relates to a series of polydithiophene benzotriazole materials, in particular to a series of polydithiophene benzotriazole derivative photovoltaic materials connected by carbon-carbon single bonds or double bonds. [0002] The invention also relates to the use of the above materials in solar cells. Background technique [0003] 1,2,3-Benzotriazole is an important electron acceptor unit, and polymers using it as an electron acceptor have been widely studied in electrochromic, sensors, polymer light-emitting diodes, etc. in recent years[( 1) Akitoshi Tanimoto, Takakazu Yamamoto. Adv. Synth. Catal. 2004, 346, 1818. (2) Yingliang Liu, Huayu Cao, Jianghui Li, Zhijian Chen, 1 Shaokui Cao, Lixin Xiao, Shengang Xu, Qihuang Gong. Journal of Polymer Science: Part A. 2007, 45, 4867. (3) Akitoshi Tanimoto, Takakazu Yamamoto. Macromolecules. 2006, 39, 3546]. However, the application of 1,2,3-benzotriazole as an acceptor unit in polymer solar cells a...

Claims

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Application Information

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IPC IPC(8): C08G61/12H01L51/46
CPCY02E10/549
Inventor 邹应萍潘春跃张振华刘波杨苗丁娉曾望东
Owner CENT SOUTH UNIV
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