Boosting charge and thermal transport - role of insulators in stable and efficient n-type polymer transistors

Zhang, Zhuoqiong1,2,3; Ho, Johnny Ka Wai1,2; Zhang, Chujun1,2; Yin, Hang4; Wen, Zhenchuan4; Cai, Guilong5; Zhao, Ruyan6; Shi, Run3; Lu, Xinhui5; Liu, Jun6; Hao, Xiaotao4; Cheng, Chun3; So, Shu Kong1,2

2021-07-01

10.1039/d1tc02346b

Journal of Materials Chemistry C   影响因子和分区

2050-7526

2050-7534

Conjugated polymers are promising materials for flexible electronics. However, some prominent challenges remain and limit further commercialization. Among these issues, n-type polymers are known to be prone to electron trappings, which may lead to heat localization, unsustainable transport and ultimately device failure. In this contribution, three n-type polymers with representative electron-transporting moieties, double B <- N bridged bipyridine (BNBP), naphthalene-diimide (NDI), and perylene-diimide (PDI), are selected and intentionally blended with a small amount of insulating polymer polystyrene (PS). In an organic field-effect transistor (OFET) structure, the blended semiconductors are shown to possess enhanced electron mobilities and device durability. The origin of the improved performance is investigated. Despite the thermally and electrically insulating properties of bulk PS, the blend films show improved heat transfer and electronic properties as revealed by scanning photothermal deflection and time-resolved photoluminescence. The counter-intuitive outcome is rationalized by a microstructure model in which PS blends inhomogeneously with the semiconductors. The added PS tends to mix with the amorphous phase, passivates phonons and charge trappings, and offers more efficient phonon and electron transport pathways. This work provides mechanistic insights into clinical device performance enhancement for semiconductor/insulator blends.

SCI ; EI

英语

通讯

Research Grant Council of Hong Kong[HKBU12200119] ; National Key Research and Development Project of the Ministry of Science and Technology of China[2016YFA0202400] ; Basic Research Project of Science and Technology Plan of Shenzhen[JCYJ20180504165655180] ; Foundation of Shenzhen Science and Technology Innovation Committee[JCYJ20180302174021198]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000686892900001

ROYAL SOC CHEMISTRY

20213910955459

Conjugated polymers ; Electron transport properties ; Flexible electronics ; Heat transfer ; Naphthalene ; Organic field effect transistors ; Phonons

Heat Transfer:641.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Electronic Equipment, General Purpose and Industrial:715 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1

Web of Science

1.Hong Kong Baptist Univ, Dept Phys, Kowloon Tong, Hong Kong, Peoples R China
2.Hong Kong Baptist Univ, Inst Adv Mat, Kowloon Tong, Hong Kong, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Shandong Univ, State Key Lab Crystal Mat, Sch Phys, Jinan 250100, Shandong, Peoples R China
5.Chinese Univ Hong Kong, Dept Phys, Hong Kong 999077, Peoples R China
6.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

Zhang, Zhuoqiong,Ho, Johnny Ka Wai,Zhang, Chujun,et al. Boosting charge and thermal transport - role of insulators in stable and efficient n-type polymer transistors[J]. Journal of Materials Chemistry C,2021,9:12281-12290.

Zhang, Zhuoqiong.,Ho, Johnny Ka Wai.,Zhang, Chujun.,Yin, Hang.,Wen, Zhenchuan.,...&So, Shu Kong.(2021).Boosting charge and thermal transport - role of insulators in stable and efficient n-type polymer transistors.Journal of Materials Chemistry C,9,12281-12290.

Zhang, Zhuoqiong,et al."Boosting charge and thermal transport - role of insulators in stable and efficient n-type polymer transistors".Journal of Materials Chemistry C 9(2021):12281-12290.