One-step Preparation of ZnO Electron Transport Layers Functionalized with Benzoic Acid Derivatives

• DOI: 10.48550/arxiv.2307.06972
• Publication Date: 2023-01-01
• Authors: Hao Liu; Chao Wang; Wen Liang Tan; Lars Thomsen; Anthony S. R. Che...; Yvonne Hora; Martyn Jevric; Jonas M. Bjuggren; Mats R. Andersson; Yahui Tang; Linjing Tang; Vũ Văn Đoán; Christopher R. Mc...
• Keywords: Benzoic acid; Acceptor; Electron acceptor; XANES; Benzoates

We present a "one-step" approach to modify ZnO electron transport layers (ETLs) used in organic solar cells. This involves adding benzoic acid (BZA) derivatives directly the precursor solution, which are then at surface of resulting film. demonstrate this for three different BZA derivatives, namely acid, chlorobenzoic and 4-hydrazinobenzoic acid. For all molecules, improved device performance stability is demonstrated cells using an active layer blend PTQ10 (donor) ITIC-Br (non-fullerene acceptor) compared such prepared untreated ZnO. Furthermore, similar or conventional PEIE treatment The presence after processing established X-ray photoelectron spectroscopy near-edge absorption fine-structure spectroscopy. From atomic force microscopy analysis diffraction studies, addition appears restrict grain growth; however, does not negatively impact performance. treated with also exhibit higher water contact angle lower work function enables simplification manufacture while still allowing optimization properties metal oxide ETLs. Keywords: layers, zinc oxide, cells, modification