Significantly Improved Morphology and Efficiency of Nonhalogenated Solvent-Processed Solar Cells Derived from a Conjugated Donor-Acceptor Block Copolymer.,Advanced Science

当前位置： X-MOL 学术 › Adv. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Significantly Improved Morphology and Efficiency of Nonhalogenated Solvent-Processed Solar Cells Derived from a Conjugated Donor-Acceptor Block Copolymer.
Advanced Science ( IF 14.3 ) Pub Date : 2020-01-09 , DOI: 10.1002/advs.201902470
Su Hong Park ₁ , Youngseo Kim ₁ , Na Yeon Kwon ₁ , Young Woong Lee ₁ , Han Young Woo ₁ , Weon-Sik Chae ₂ , Sungnam Park ₁ , Min Ju Cho ₁ , Dong Hoon Choi ₁

Affiliation

A highly crystalline conjugated donor (D)-acceptor (A) block copolymer (PBDT2T-b-N2200) that has good solubility in nonhalogenated solvents is successfully synthesized. PBDT2T-b-N2200 shows a broad complementary absorption behavior owing to a wide-band gap donor (PBDT2T) present as a D-block and a narrow-band gap acceptor (N2200) present as an A-block. Polymer solar cells (PSCs) with conjugated block copolymer (CBCP) are fabricated using a toluene solution and PSC created with an annealed film showing the highest power conversion efficiency of 6.43%, which is 2.4 times higher than that made with an annealed blend film of PBDT2T and N2200. Compared to the blend film, the PBDT2T-b-N2200 film exhibits a highly improved surface and internal morphology, as well as a faster photoluminescence decay lifetime, indicating a more efficient photoinduced electron transfer. In addition, the PBDT2T-b-N2200 film shows high crystallinity through an effective self-assembly of each block during thermal annealing and a predominant face-on chain orientation favorable to a vertical-type PSC. Moreover, the CBCP-based PSCs exhibit an excellent shelf-life time of over 1020 h owing to their morphological stability. From these results, a D-A block copolymer system is one of the efficient strategies to improve miscibility and morphological stability in all polymer blend systems.

中文翻译：

由共轭供体-受体嵌段共聚物衍生的非卤化溶剂处理太阳能电池的形态和效率显着改善。

成功合成了一种在非卤化溶剂中具有良好溶解性的高结晶性共轭供体（D）-受体（A）嵌段共聚物（PBDT2T-b-N2200）。由于宽带隙供体 (PBDT2T) 作为 D 块存在和窄带隙受体 (N2200) 作为 A 块存在，PBDT2T-b-N2200 显示出广泛的互补吸收行为。具有共轭嵌段共聚物（CBCP）的聚合物太阳能电池（PSC）是使用甲苯溶液和用退火薄膜制成的PSC制造的，显示出最高的功率转换效率为6.43%，比用退火共混薄膜制成的PSC高2.4倍。 PBDT2T 和 N2200。与共混薄膜相比，PBDT2T-b-N2200薄膜表现出高度改善的表面和内部形貌，以及更快的光致发光衰减寿命，表明光诱导电子转移更有效。此外，PBDT2T-b-N2200薄膜在热退火过程中通过每个嵌段的有效自组装而表现出高结晶度，并且具有有利于垂直型PSC的主要面链取向。此外，基于 CBCP 的 PSC 由于其形态稳定性而表现出超过 1020 小时的优异保质期。从这些结果来看，DA嵌段共聚物体系是提高所有聚合物共混体系的混溶性和形态稳定性的有效策略之一。

更新日期：2020-01-09

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11