Gas-Blowing Medicated Aggregation toward 19% Efficiency in Printed Organic Solar Cell from Nonhalogenated Solvent

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-09-15 DOI:10.1021/acsmaterialslett.5c01065

Shang Wen, , , Weiyi Xia, , , Zirui Gan, , , Jingchao Cheng, , , Yuandong Sun, , , Yujie Yang, , , Yunxia Mao, , , Hanyang Chen, , , Dan Liu, , , Wei Li*, , and , Tao Wang*,

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Abstract

Doctor-blading is a promising alternative for the large-area printing of organic solar cells (OSCs). However, the power conversion efficiencies (PCEs) of doctor-bladed OSCs are still lower than those of their spin-cast counterparts. This is mainly caused by the prolonged molecular organization time during which excessive aggregation can be encouraged. In this work, a post-treatment using nitrogen gas to blow the backside of the photoactive layer, i.e., the ITO glass side, was utilized to modulate the aggregation growth after blade-coating from a nonhalogenated solvent. A range of morphological measurements reveal that gas-blowing suppresses excessive aggregation of nonfullerene acceptors. As a result, gas-blowing treated PM6:BTP-eC9 OSCs obtained a maximum PCE of 19.0%, which is among the highest values of blade-coated OSCs. Moreover, this morphology transformation also drives the photoactive layer toward the thermodynamic equilibrium state, reducing free volume in the photoactive layer and contributing to better device stabilities.

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非卤化溶剂印刷有机太阳能电池吹气药物聚集效率19%

在有机太阳能电池（OSCs）的大面积印刷中，医生叶片是一个很有前途的选择。然而，医生叶片osc的功率转换效率（pce）仍然低于自旋铸造osc的功率转换效率。这主要是由于分子组织时间延长，在此期间可以鼓励过度聚集。在这项工作中，利用氮气吹光活性层的背面，即ITO玻璃侧的后处理，来调节非卤化溶剂叶片涂层后的聚集生长。一系列形态学测量表明，吹气抑制非富勒烯受体的过度聚集。因此，吹气处理的PM6:BTP-eC9 OSCs的PCE最大值为19.0%，是叶片涂覆OSCs的最高值之一。此外，这种形态转变也促使光活性层走向热力学平衡状态，减少了光活性层中的自由体积，有助于提高器件的稳定性。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.