@article{dong_lee_song_neu_kashani_you_ade_2025, title={Control Over Vertical Composition in Low Complexity Polymer Solar Cells}, volume={1}, ISSN={["1614-6840"]}, url={https://doi.org/10.1002/aenm.202404962}, DOI={10.1002/aenm.202404962}, abstractNote={Abstract Inverted organic solar cells are promising due to their better stability compared to conventional structures. Donors with low synthetic complexity are desirable to lower costs. However, inverted devices are rarely used in low‐complexity systems. To investigate the reasons, the low‐complexity PTQ10:BTP‐eC9 binary system is benchmarked against the high‐complexity PM6:BTP‐eC9 system. In PTQ10:BTP‐eC9, where the efficiency of inverted devices lags the conventional structure significantly, distinct wetting layers are observed in conventional and inverted device structures. Conversely, the vertical distribution of PM6:BTP‐eC9 remains unaffected by changes in interlayer materials. The surface is always enriched in BTP‐eC9, but less for PM6. Importantly, the addition of PC 71 BM reduces the nonuniform vertical composition gradients. As the PC 71 BM concentration increases, the efficiency of the inverted PTQ10 devices approach that of the conventional devices and PTQ10:BTP‐eC9:PC 71 BM (1:1.2:0.4) exhibits negligible efficiency differences between inverted (14.01%) and conventional (14.49%) architectures. The concentration‐gradients aredriven by the interfacial energy between the active layer and interlayer materials and the casting kinetics in the case of the surface. Understanding the thermodynamic and kinetic aspects provides valuable insights for optimizing the performance of inverted organic solar cells, bringing them closer to practical applications.}, journal={ADVANCED ENERGY MATERIALS}, author={Dong, Xinyun and Lee, Byongkyu and Song, Runqiao and Neu, Justin and Kashani, Somayeh and You, Wei and Ade, Harald}, year={2025}, month={Jan} } @article{he_hadmojo_hu_mukherjee_alqurashi_althobaiti_de castro_lee_ding_luke_et al._2025, title={Significant Efficiency Enhancements in Non-Y Series Acceptors by the Addition of Outer Side Chains}, volume={1}, ISSN={["2198-3844"]}, DOI={10.1002/advs.202414042}, abstractNote={Abstract Most current highly efficient organic solar cells utilize small molecules like Y6 and its derivatives as electron acceptors in the photoactive layer. In this work, a small molecule acceptor, SC8‐IT4F, is developed through outer side chain engineering on the terminal thiophene of a conjugated 6,12‐dihydro‐dithienoindeno[2,3‐d:2′,3′‐d′]‐s‐indaceno[1,2‐b:5,6‐b′]dithiophene (IDTT) central core. Compared to the reference molecule C8‐IT4F, which lacks outer side chains, SC8‐IT4F displays notable differences in molecule geometry (as shown by simulations), thermal behavior, single‐crystal packing, and film morphology. Blend films of SC8‐IT4F and the polymer donor PM6 exhibit larger carrier mobilities, longer carrier lifetimes, and reduced recombination compared to C8‐IT4F, resulting in improved device performance. Binary photovoltaic devices based on the PM6:SC8‐IT4F films reveal an optimal efficiency over 15%, which is one of the best values for non‐Y type small molecule acceptors (SMAs). The resultant devices also show better thermal and operational stability than the control PM6:L8‐BO devices. SC8‐IT4F and its blend exhibit a higher relative degree of crystallinity and π coherence length, compared to C8‐IT4F samples, beneficial for charge transport and device performance. The results indicate that outer side chain engineering on existing small electron acceptors can be a promising molecular design strategy for further pursuing high‐performance organic solar cells.}, journal={ADVANCED SCIENCE}, author={He, Qiao and Hadmojo, Wisnu Tantyo and Hu, Xiantao and Mukherjee, Subhrangsu and Alqurashi, Maryam and Althobaiti, Wejdan and De Castro, Catherine S. P. and Lee, Byongkyu and Ding, Bowen and Luke, Joel and et al.}, year={2025}, month={Jan} } @article{jeong_park_ji_cho_lee_jeong_jung_yang_zhang_yoon_et al._2023, title={Building-up an interrelationship between isomeric benzyl inner side chains within nonfullerene acceptors and isomeric xylene solvents for non-chlorinated solvent-processed organic solar cells}, volume={11}, ISSN={["2050-7496"]}, DOI={10.1039/d2ta08621b}, abstractNote={Three isomeric BzY-series NFAs are developed by introducing inner benzyl side chains. Among the BzY-series NFA-based OSCs processed with non-chlorinated xylene solvents, PM6 : m-BzY exhibits PCE over 16% without an additive and thermal annealing process.}, number={9}, journal={JOURNAL OF MATERIALS CHEMISTRY A}, author={Jeong, Seonghun and Park, Jeewon and Ji, Yutong and Cho, Yongjoon and Lee, Byongkyu and Jeong, Mingyu and Jung, Sungwoo and Yang, Sangjin and Zhang, Youdi and Yoon, Seong-Jun and et al.}, year={2023}, month={Feb}, pages={4703–4716} }