Role of Solution Structure in Self-Assembly of Conjugated Block Copolymer Thin Films

被引：17

作者：

Brady, Michael A. ^{[1
,7
]}

Ku, Sung-Yu ^{[1
,8
]}

Perez, Louis A. ^{[1
,9
]}

Cochran, Justin E. ^{[2
]}

Schmidt, Kristin ^{[4
]}

Weiss, Thomas M. ^{[4
]}

Toney, Michael F. ^{[4
]}

Ade, Harald ^{[5
]}

Hexemer, Alexander ^{[6
]}

Wang, Cheng ^{[6
]}

Hawker, Craig J. ^{[1
,2
]}

Kramer, Edward J. ^{[1
,3
]}

Chabinyc, Michael L. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

[3] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

[4] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[5] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[6] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[7] Lawrence Berkeley Natl Lab, Berkeley, CA USA

[8] Dow Chem Co USA, Freeport, TX USA

[9] Apeel Sci, Santa Barbara, CA USA

来源：

MACROMOLECULES | 2016年 / 49卷 / 21期

基金：

美国国家科学基金会;

关键词：

POLYMER SOLAR-CELLS; FIELD-EFFECT TRANSISTORS; X-RAY SCATTERING; BICONTINUOUS DONOR/ACCEPTOR MORPHOLOGIES; 25TH ANNIVERSARY ARTICLE; ONE-POT SYNTHESIS; DIBLOCK COPOLYMERS; HIGH-EFFICIENCY; SEMICONDUCTING POLYMERS; MICROPHASE SEPARATION;

D O I：

10.1021/acs.macromol.6b01686

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Conjugated block copolymers provide a pathway to achieve thermally stable nanostructured thin films for organic solar cells. We characterized the structural evolution of poly(3-hexylthiophene)-block-poly(diketopyrrolopyrrole-terthiophene) (P3HT-b-DPPT-T) from solution to nanostructured thin films. Aggregation of the DPPT-T block of P3HT-b-DPPT-T was found in solution by small-angle X-ray scattering with the P3HT block remaining well-solvated. The nanostructure in thin films was determined using a combination of wide and small-angle X-ray scattering techniques as a function of processing conditions. The structure in solution controlled the initial nanostructure in spin-cast thin films, allowing subsequent thermal annealing processes to further improve the ordering. In contrast to the results for thin films, nanostructural ordering was not observed in the bulk samples by small-angle X-ray scattering. These results suggest the importance of controlling solvent induced aggregation in forming nanostructured thin films of conjugated block copolymers.

引用

页码：8187 / 8197

页数：11

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