SKM 2023 – wissenschaftliches Programm

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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: Vortrag

Montag, 27. März 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.