Naphthalene diimide-based small molecule acceptors for organic solar cells

Abstract

This work introduces six novel naphthalene diimide (NDI) molecular acceptors for evaluation in organic solar cells based on two different chemical architectures: a star-shaped structure with a triarylamine core flanked by three NDI moieties and a linear molecule composed of a bithiophene bridge between two NDI moieties.

An overview on synthetic strategies for the construction of star-shaped molecules

“…36 Some of these compounds were designed to study their promising photovoltaic application in organic solar cells OSCs. [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] The present review casts light on the main strategies for the synthesis of star-shaped molecules especially those containing heterocyclic core and/or heterocyclic arms. The star-shaped molecules mentioned in this review are classied according to the central core as well as the type of side arms.…”

Alkylsilyl Functionalized Copolymer Donor for Annealing‐Free High Performance Solar Cells with over 11% Efficiency: Crystallinity Induced Small Driving Force

“…Considerable progress has been achieved in bulk heterojunction polymer solar cells (PSCs), as emerge of the wide‐band gap polymer donors and nonfullerene acceptors . Due to the complementary absorption, appropriate energy level alignment, and meticulous morphology between donor and acceptor materials, the power conversion efficiencies (PCEs) of nonfullerene‐based PSCs close to 15% have been realized …”

Non-fullerene small molecule electron acceptors for high-performance organic solar cells

“…Recently, Rundel et al [112] reported a series of NDI acceptors consisting of two kinds of structures: a star-shaped structure with a triphenylamine as the core and three NDI moieties as branches ( B14 -B16 ), and a linear molecular structure composed of a bithiophene as core with two NDI moieties as arms ( B17 -B19 ). Alkyl chains were linked to the NDI core through oxygen, sulfur, or nitrogen substituents to compare the differences in influence on the optoelectronic and photovoltaic properties of these molecular acceptors.…”