Review on Y6-Based Semiconductor Materials and Their Future Development via Machine Learning

Abstract

Non-fullerene acceptors are promising to achieve high efficiency in organic solar cells (OSCs). Y6-based acceptors, one group of new n-type semiconductors, have triggered tremendous attention when they reported a power-conversion efficiency (PCE) of 15.7% in 2019. After that, scientists are trying to improve the efficiency in different aspects including choosing new donors, tuning Y6 structures, and device engineering. In this review, we first summarize the properties of Y6 materials and the seven critical methods modifying the Y6 structure to improve the PCEs developed in the latest three years as well as the basic principles and parameters of OSCs. Finally, the authors would share perspectives on possibilities, necessities, challenges, and potential applications for designing multifunctional organic device with desired performances via machine learning.

Efficient and Moisture‐Stable Inverted Perovskite Solar Cells via n‐Type Small‐Molecule‐Assisted Surface Treatment

“…The grain size of the Y6‐ and JY16‐treated perovskite films increased via Lewis acid–base interactions between Pb 2+ of perovskite and Lewis base functional groups in Y6 and JY16, which slowed nucleation and retarded the growth of perovskite films. [ 15 ] SEM was used to investigate the morphology of the JY16‐treated perovskite films according to varied JY16 concentrations (Figure S4, Supporting Information). Perovskite films treated with JY16 of various concentrations exhibited morphology with densely packed and free of pinholes.…”

The influence of terminal alkyl groups on the structure, and electrical and sensing properties of thin films of self-assembling organosilicon derivatives of benzothieno[3,2-b][1]benzothiophene

“…Organic semiconductors are promising materials for microelectronics due to their great diversity and tunability of their optoelectronic properties. [1][2][3][4][5][6] These materials are used in the manufacture of different organic electronic devices such as light-emitting diodes, [7][8][9] organic photovoltaics, [10][11][12] organic thin-film transistors (OTFTs), 13,14 and various sensors. [15][16][17][18] The key features of organic semiconductors are their flexibility, low cost, ability to crystallize from solutions and thin film formation.…”

Photo‐induced energy and charge transfer dynamics in Y6 dimers

“…[ 25 ] Meanwhile, the properties of Y6, such as electronic energy levels, conjugated structure, and morphology shapes can be easily adjusted by using substituent. [ 26 ]…”

“…[25] Meanwhile, the properties of Y6, such as electronic energy levels, conjugated structure, and morphology shapes can be easily adjusted by using substituent. [26] In the material film of OSCs, in addition to the donor(D)-acceptor(A) interfaces, D-D and A-A interfaces remarkably affect the PCE. In this work, we only focus on the interfaces among acceptors, that is, Y6-Y6 interfaces, to investigate their electronic structure properties and photophysical processes.…”