SKM 2023 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 1: Focus: Organic Solar Cells Based on Non-fullerene Acceptors: Loss Mechanism and Options for Above 20 % Efficiencies I
CPP 1.5: Talk
Monday, March 27, 2023, 10:45–11:00, GÖR 226
Synthesis and Characterization of Organic Heterojunction Model Interfaces — •Hanbo Yang1, Jarvist Moore Frost1, Jenny Nelson1, and Hugo Bronstein2 — 1Imperial College London, London, UK — 2Cambridge University, Cambridge, UK
Control of the molecular configuration at the interface of an organic heterojunction is key to the development of efficient optoelectronic devices. Due to the difficulty in characterizing these buried and (likely) disordered heterointerfaces the interfacial structure in most systems remains a mystery. Here, we demonstrate a novel synthetic strategy to design and control model interfaces, allowing for their detailed study in isolation from the bulk material. This is achieved by the synthesis of a donor polymer-non-fullerene acceptor 'through space' linked system, where the exact position and orientation of the moieties is completely controlled and we furthered showed that the kinetics of charge separation can be tuned using transient absorption spectroscopy and excited state calculations.