Cost‐Effective Perylene‐Diimide Non‐Conjugated Polymer as Cathode Interlayer for Large‐Scale Production of Organic Photovoltaics
Year: 2025
Type: article
Abstract: At present, organic solar cells (OSCs) stand at a key stage of industrialization. Although many organic photovoltaic materials exhibit outstanding performance, they cannot meet the requirements for large‐scale production. Here, a cost‐effective and high‐throughput method is reported to prepare Perylene/naphthalene‐diimide (PDI/NDI) non‐conjugated polymers for serving as cathode interlayer (CIL) materials in OSCs. By utilizing low‐cost raw materials, the NDI/PDI polymers can be readily synthesized without involving purification by column chromatography, which minimizes the cost of CILs. Notably, the performance of PDI‐OEG CIL is insensitive to preparation conditions and processing methods, thereby lowering the technical threshold for practical applications, which is essentially important for large‐scale production. By using a binary blend PM6:L8‐BO as an active layer, the OSC modified by PDI‐OEG exhibited a power conversion efficiency (PCE) of 18.7%. It is demonstrated that the suitable work function, self‐doping effect, and H‐aggregate endowed PDI‐OEG with excellent electron collection capability, which can suppress the charge recombination in OSCs. Moreover, PDI‐OEG is well‐compatible with a large‐area blade‐coating technique, and a 1‐cm 2 OSC can be fabricated by using a blade‐coated PDI‐OEG, delivering a PCE of 17.0%. The results suggest that PDI‐OEG is a promising CIL material for advancing the industrialization of organic photovoltaic technology.
Source: Small
Authors: Wenxi Xiao, Yanhe Xiang, Qingyang Li, Zhe Li, Bowei Xu, Shouke Yan
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Awards: G1995591303, G2739221917
OpenAlex ID: W4409081984