Highly efficient halogen-free rigid and flexible binary organic solar cells using new solid indacene additive

IF 10 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Vijaya Gopalan Sree , Thavamani Gokulnath , Bommaramoni Yadagiri , Jung Inn Sohn , Hyun-Seok Kim , Chinna Bathula
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引用次数: 0

Abstract

Flexible Organic solar cells (OSCs) have garnered widespread attention due to the increased popularity of wearable electronic devices. To enhance the efficiency and stability of the device we have prepared (2E,2′E)-3,3'-(4,4,9,9-tetrahexadecyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b'] dithiophene-2,7-diyl)bis(2-cyanoacrylic acid) (IDT) based dopant by reacting the aldehyde precursor with cyanoacetic acid in the presence of piperdine. Here, we investigate the effect of IDT on the performance of OSCs by adding IDT to star active layers PM6:Y6 and PM6:BTP-eC9 to improve OSCs' performance through morphology optimization. The addition of 5 wt% IDT significantly improved the device performance, achieving a remarkable PCE of 16.08 % for PM6:Y6 devices. The charge transport and recombination dynamics analysis showed that the appropriate concentration of IDT can provide better channels for carrier transport, promoting effective charge generation and extraction in OSCs. It is observed that the addition of IDT promotes effective generation and dissociation of excitons, thus improving OSC performance. The flexible ITO-free OSC was fabricated using PM6:Y6:IDT as the active layer film, achieving a high PCE of 12.59 % with VOC, JSC, and FF of 0.83 V, 23.21 mA/cm2 and 68.63 %, respectively. Hence, the findings indicate a reliable approach which could potentially deliver rigid and flexible OSCs with excellent performance and commercial viability.

使用新型固体茚添加剂的高效无卤刚性和柔性二元有机太阳能电池
随着可穿戴电子设备的日益普及,柔性有机太阳能电池(OSC)受到了广泛关注。为了提高器件的效率和稳定性,我们通过在哌啶存在下使醛前体与氰基乙酸反应,制备了基于(2E,2′E)-3,3'-(4,4,9,9-四十六烷基-4,9-二氢-s-茚并[1,2-b:5,6-b']二噻吩-2,7-二基)双(2-氰基丙烯酸)(IDT)的掺杂剂。在这里,我们通过在星形活性层 PM6:Y6 和 PM6:BTP-eC9 中添加 IDT 来研究 IDT 对 OSC 性能的影响,从而通过形态优化来提高 OSC 的性能。添加 5 wt% 的 IDT 能显著提高器件性能,PM6:Y6 器件的 PCE 达到了 16.08%。电荷传输和重组动力学分析表明,适当浓度的 IDT 可为载流子传输提供更好的通道,促进 OSC 中电荷的有效产生和提取。据观察,添加 IDT 可促进激子的有效产生和解离,从而提高 OSC 的性能。使用 PM6:Y6:IDT 作为活性层薄膜制造出了柔性无 ITO OSC,实现了 12.59 % 的高 PCE,VOC、JSC 和 FF 分别为 0.83 V、23.21 mA/cm2 和 68.63 %。因此,研究结果表明这是一种可靠的方法,有可能生产出具有优异性能和商业可行性的刚性和柔性 OSC。
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来源期刊
Materials Today Physics
Materials Today Physics Materials Science-General Materials Science
CiteScore
14.00
自引率
7.80%
发文量
284
审稿时长
15 days
期刊介绍: Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.
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