Confinement effects in one-dimensional nanoarrays of polymer semiconductors and their photovoltaic blends

POLYMER

卷:163

Article

Hernandez, Jaime J.¹  Puente-Orench, Ines^2,3  Ezquerra, Tiberio A.⁴  Gutierrez-Fernandez, Edgar⁴  Garcia-Gutierrez, Mari-Cruz⁴ 

[1] Inst Adv Studies Nanosci, Faraday 9, Madrid 28049, Spain

[2] Aragon Mat Sci Inst, Pedro Cerbuna 12, Zaragoza 50009, Spain

[3] Inst Laue Langevin, 71 Av Martyrs, F-38042 Grenoble 9, France

[4] Inst Struct Matter IEM CSIC, Serrano 121, Madrid 28006, Spain

关键词: Confinement;    Conjugated polymers;    X-ray nanoprobes;    Nanowires;    Organic electronics;   

DOI  :  10.1016/j.polymer.2018.12.036

来源: Elsevier

【 摘 要 】

We report on the strong changes induced, by confinement, in the microstructure of the semiconductor poly(2,5-bis(3-hexadecylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) and its photovoltaic blend with [6,6]-Phenyl-C71-butyric acid methyl ester (PC71BM). These organic compounds can be used as model systems to illustrate how sensitive this class of materials can be to spatial confinement on device-relevant length scales. The spatial confinement of nanofilaments as a function of diameter, from 180 to 25 nm, has been investigated by X-ray scattering with nanofocused synchrotron beams. The effects of spatial confinement are evident by crystallization in different crystal forms, reduction of crystallinity, phase segregation and anisotropic crystal orientation. It is also shown that confinement is an efficient tool to direct the overall texture included the crystal orientation of the homopolymer PBTTT and the PBTTT/PC(71)Bm blend in a controlled manner.

【 授权许可】

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