Chlorine-Mediated Organic Photovoltaic Materials★

doi:10.6023/A23050245

Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (11): 1541-1550.DOI: 10.6023/A23050245 Previous Articles Next Articles

Special Issue: 庆祝《化学学报》创刊90周年合辑

Perspective

氯介导有机光伏材料^★

蒲明瑞^a, 何凤^a^,^b^,^*()

a 南方科技大学化学系深圳格拉布斯研究所广东深圳 518055
b 南方科技大学广东省催化重点实验室广东深圳 518055

投稿日期:2023-05-22 发布日期:2023-07-04

作者简介:

蒲明瑞, 南方科技大学化学系2021级在读博士研究生. 目前研究方向为有机太阳能电池聚合物给体材料的设计合成及其光伏性能研究.

何凤博士现为南方科技大学化学系教授, 课题组长, 国家杰出青年基金获得者. 近五年紧紧围绕有机功能材料分子间非共价分子间相互作用的精确调控集中开展科学研究, 并在有机氯取代光伏材料和超分子聚合物二维自组装两个方向上都取得了突破性进展. 2006年入选中德科学中心林岛学者项目, 2019年获得中国化学会氯元素代言青年科学家. 至今在Joule、J. Am. Chem. Soc.、Nat. Commun.以及Adv. Mater.等国际顶尖专业杂志上已发表论文超过150篇, 引用次数超过6000次.

^★庆祝《化学学报》创刊90周年.

基金资助:
国家自然科学基金项目(22225504); 国家自然科学基金项目(21975115); 深圳市基础研究计划项目(JCYJ20200109140801751); 深圳市基础研究计划项目(JCYJ20210324120010028); 广东省催化重点实验室(2020B121201002)

Chlorine-Mediated Organic Photovoltaic Materials^★

Mingrui Pu^a, Feng He^a^,^b()

a Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518055
b Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong 518055

Received:2023-05-22 Published:2023-07-04
Contact: *E-mail: hef@sustech.edu.cn
About author:
^★Dedicated to the 90th anniversary of Acta Chimica Sinica.
Supported by:
National Natural Science Foundation of China(22225504); National Natural Science Foundation of China(21975115); Shenzhen Fundamental Research Program(JCYJ20200109140801751); Shenzhen Fundamental Research Program(JCYJ20210324120010028); Guangdong Provincial Key Laboratory of Catalysis(2020B121201002)

The reasonable design of materials plays a crucial role in improving the power conversion efficiency (PCE) of organic solar cells (OSCs). In recent years, OSCs have achieved great success in the research of donor and acceptor materials, making a significant contribution to the rapid growth of efficiency. Currently, their maximum efficiency is over 19%, demonstrating their great potential in practical applications. Chlorine-mediated strategy is proved to be an effective method to regulate the properties of the donor and acceptor materials and has important application significance. Through efforts, our research group has gradually formed a “Chlorine-Mediated Organic Photovoltaic Materials System” based on the continuous progress and accumulated achievements. In this perspective, the development of a series of representative chlorine-mediated polymer donor and non-fullerene acceptor materials using chlorine-mediated strategies in recent years are briefly introduced. The ability of chlorine atoms to regulate material energy levels, intermolecular stacking, active layer film morphology, and their important effects on the photovoltaic performance of devices were emphasized, and their intrinsic mechanisms were explored. In addition, some key issues such as efficiency, cost, and stability that should be considered when developing next generation chlorine-mediated organic photovoltaic materials in the future are also discussed.

Key words: chlorine-mediated interaction, single-crystal, donor materials, acceptor materials, device physics

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Mingrui Pu, Feng He. Chlorine-Mediated Organic Photovoltaic Materials^★[J]. Acta Chimica Sinica, 2023, 81(11): 1541-1550.

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Fig. & Tab. 8

Figure 1. Structural formula of PTB7-Th and PBClT, and voltage change after chlorination, ITIC as the acceptor

Figure 2. -1 Partial chlorine-mediated polymer donor and non-fullerene acceptor materials and their chemical structural formulas

Figure 2. -2 Partial chlorine-mediated polymer donor and non-fullerene acceptor materials and their chemical structural formulas

Figure 3. (a) Polymer PBBD, PBBD-Cl-α and PBBD-Cl-β structural formula; (b) the single crystal structure of monomers TTO, TTO-Cl-α and TTO-Cl-β; (c) GIWAXS curves of active layer films; (d) devices hole mobility and efficiency[26]

Figure 4. (a) Structural formulas of polymers PBDP-H, PBDP-Cl, and PBDP-2Cl; (b) theoretical calculation of molecular conformation; (c) contact angle tests and active layer morphology. Reproduced with permission.[27] Copyright 2022, Elsevier Inc.

Figure 5. Structural formula of (a) IDIC-4H, (b) IDIC-4F and (c) IDIC-4Cl, and corresponding single crystal data and molecular stacking diagram. Reproduced with permission.[28] Copyright 2018, American Chemical Society

Figure 6. (a) Structural formula of ITIC-2Cl-δ and corresponding single crystal data and molecular stacking diagram. (b) Structural formula of ITIC-2Cl-γ and corresponding single crystal data and molecular stacking diagram. Reproduced with permission.[29] Copyright 2019, Elsevier Inc.

Figure 7. (a) Structural formula of BTIC-BO-4Cl; (b) corresponding single crystal data and its three-dimensional network stacking framework; (c) BHJ device sectional view; (d) schematic diagram of BHJ device mechanism; (e) Q-PHJ device sectional view; (f) schematic diagram of Q-PHJ device mechanism. Reproduced with permission.[32] Copyright 2021, Wiley-VCH

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Chlorine-Mediated Organic Photovoltaic Materials★

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氯介导有机光伏材料^★

Chlorine-Mediated Organic Photovoltaic Materials^★