@article{xu_xue_stuard_ade_zhang_yao_li_li_2021, title={Reducing Energy Disorder of Hole Transport Layer by Charge Transfer Complex for High Performance p-i-n Perovskite Solar Cells}, volume={33}, ISSN={["1521-4095"]}, DOI={10.1002/adma.202006753}, abstractNote={Abstract}, number={13}, journal={ADVANCED MATERIALS}, author={Xu, Guiying and Xue, Rongming and Stuard, Samuel J. and Ade, Harald and Zhang, Chenjie and Yao, Jianlin and Li, Yaowen and Li, Yongfang}, year={2021}, month={Apr} }
 @article{szymanski_henry_stuard_vongsaysy_courtel_vellutini_bertrand_ade_chambon_wantz_2020, title={Balanced Charge Transport Optimizes Industry-Relevant Ternary Polymer Solar Cells}, volume={4}, ISSN={["2367-198X"]}, url={https://doi.org/10.1002/solr.202000538}, DOI={10.1002/solr.202000538}, abstractNote={Bulk heterojunction polymer solar cells based on a novel combination of materials are fabricated using industry‐compliant conditions for large area manufacturing. The relatively low‐cost polymer PTQ10 is paired with the nonfullerene acceptor 4TIC‐4F. Devices are processed using a nonhalogenated solvent to comply with industrial usage in absence of any thermal treatment to minimize the energy footprint of the fabrication. No solvent additive is used. Adding the well‐known and low‐cost fullerene derivative PC61BM acceptor to this binary blend to form a ternary blend, the power conversion efficiency (PCE) is improved from 8.4% to 9.9% due to increased fill factor (FF) and open‐circuit voltage (VOC) while simultaneously improving the stability. The introduction of PC61BM is able to balance the hole–electron mobility in the ternary blends, which is favourable for high FF. This charge transport behavior is correlated with the bulk heterojunction (BHJ) morphology deduced from grazing‐incidence wide‐angle X‐ray scattering (GIWAXS), atomic force microscopy (AFM), and surface energy analysis. In addition, the industrial figure of merit (i‐FOM) of this ternary blend is found to increase drastically upon addition of PC61BM due to an increased performance–stability–cost balance.}, number={11}, journal={SOLAR RRL}, publisher={Wiley}, author={Szymanski, Robin and Henry, Reece and Stuard, Samuel and Vongsaysy, Uyxing and Courtel, Stephanie and Vellutini, Luc and Bertrand, Melanie and Ade, Harald and Chambon, Sylvain and Wantz, Guillaume}, year={2020}, month={Nov} }
 @article{lei_seyitliyev_stuard_mendes_dong_fu_chen_he_yi_zhu_et al._2020, title={Efficient Energy Funneling in Quasi-2D Perovskites: From Light Emission to Lasing}, volume={32}, ISSN={["1521-4095"]}, DOI={10.1002/adma.201906571}, abstractNote={Abstract}, number={16}, journal={ADVANCED MATERIALS}, author={Lei, Lei and Seyitliyev, Dovletgeldi and Stuard, Samuel and Mendes, Juliana and Dong, Qi and Fu, Xiangyu and Chen, Yi-An and He, Siliang and Yi, Xueping and Zhu, Liping and et al.}, year={2020}, month={Apr} }
 @article{kim_kim_gadisa_stuard_nahid_kwon_bae_kim_park_won_et al._2020, title={Morphological-Electrical Property Relation in Cu(In,Ga)(S,Se)(2) Solar Cells: Significance of Crystal Grain Growth and Band Grading by Potassium Treatment}, volume={16}, ISSN={["1613-6829"]}, DOI={10.1002/smll.202003865}, abstractNote={Abstract}, number={48}, journal={SMALL}, author={Kim, Joo-Hyun and Kim, Min Kyu and Gadisa, Abay and Stuard, Samuel J. and Nahid, Masrur Morshed and Kwon, Soyeong and Bae, Soohyun and Kim, Byoungwoo and Park, Gi Soon and Won, Da Hye and et al.}, year={2020}, month={Dec} }
 @article{liang_li_wang_qin_stuard_peng_deng_ade_ye_geng_2020, title={Optimization Requirements of Efficient Polythiophene:Nonfullerene Organic Solar Cells}, volume={4}, ISSN={["2542-4351"]}, url={https://publons.com/wos-op/publon/33106087/}, DOI={10.1016/j.joule.2020.04.014}, abstractNote={Polythiophene (PT) and its derivatives have attracted long-standing attention in the organic photovoltaic community for their low cost and high scalability of synthesis. However, due to the lack of rational guidelines in controlling morphology and matching materials, the power conversion efficiencies (PCEs) based on PTs reported so far are generally below 10%. Here, we establish the first-ever relationship between miscibility, morphology, and device performance of binary blends, based on various nonfullerene acceptors (ITIC-Th1, ITIC, IT4F, IDIC, and Y6) and a PT derivative named PDCBT-Cl by scattering and calorimetric characterizations. Benefiting from a properly quenched mixed phase, PDCBT-Cl:ITIC-Th1 system shows the best efficiency of over 12%. Conversely, the blend of PDCBT-Cl and the star acceptor Y6 remained in a homogeneous state due to their high miscibility, resulting in abysmal performance with PCE of 0.5%. Specific guidelines are also proposed to remediate the performance of PDCBT-Cl:Y6, which are crucial for advancing their practical applications.}, number={6}, journal={JOULE}, author={Liang, Ziqi and Li, Miaomiao and Wang, Qi and Qin, Yunpeng and Stuard, Sam J. and Peng, Zhongxiang and Deng, Yunfeng and Ade, Harald and Ye, Long and Geng, Yanhou}, year={2020}, month={Jun}, pages={1278–1295} }
 @article{kang_ye_xu_an_stuard_zhang_yao_ade_hou_2019, title={A Printable Organic Cathode Interlayer Enables over 13% Efficiency for 1-cm(2) Organic Solar Cells}, volume={3}, ISSN={["2542-4351"]}, url={https://publons.com/wos-op/publon/17838771/}, DOI={10.1016/j.joule.2018.10.024}, abstractNote={Currently, most cathode interlayer (CIL) materials for organic solar cells (OSCs) cannot be processed by printing techniques, which severely limits their use in practical productions. Herein, we report a naphthalene diimide (NDI)-based small-molecular compound (N,N-dimethylamino)propyl naphthalene diimide (NDI-N) as printable CIL for OSCs. NDI-N exhibits a unique advantage that combines the merits of high crystallinity and good film-forming property in one material, endowing the semiconductor with excellent electron-transport properties and good processability. By using the NDI-N as CIL, a high power-conversion efficiency (PCE) of 13.9% was achieved in a PBDB-T-2F:IT-4F-based OSC device. More importantly, a large-area OSC device of 1 cm2 was fabricated by using the blade-coated NDI-N CIL and an outstanding PCE of 13.2% was achieved, which represents the highest efficiency of large-area OSCs. The results in this work may pave the way for low-cost and mass production of OSCs.}, number={1}, journal={JOULE}, author={Kang, Qian and Ye, Long and Xu, Bowei and An, Cunbin and Stuard, Samuel J. and Zhang, Shaoqing and Yao, Huifeng and Ade, Harald and Hou, Jianhui}, year={2019}, month={Jan}, pages={227–239} }
 @article{hu_oswald_hu_stuard_nahid_yan_chen_ade_neilson_you_2019, title={Aryl-Perfluoroaryl Interaction in Two-Dimensional Organic-Inorganic Hybrid Perovskites Boosts Stability and Photovoltaic Efficiency}, volume={1}, ISSN={["2639-4979"]}, DOI={10.1021/acsmaterialslett.9b00102}, abstractNote={Two-dimensional (2D) organic–inorganic hybrid perovskites (OIHPs) have showed impressive stability, compared to their three-dimensional (3D) counterparts. However, tuning the chemical structure of ...}, number={1}, journal={ACS MATERIALS LETTERS}, author={Hu, Jun and Oswald, Iain W. H. and Hu, Huamin and Stuard, Samuel J. and Nahid, Masrur Morshed and Yan, Liang and Chen, Zheng and Ade, Harald and Neilson, James R. and You, Wei}, year={2019}, month={Jul}, pages={171–176} }
 @article{carpenter_ghasemi_gann_angunawela_stuard_rech_ritchie_brendan t. o'connor_atkin_you_et al._2019, title={Competition between Exceptionally Long-Range Alkyl Sidechain Ordering and Backbone Ordering in Semiconducting Polymers and Its Impact on Electronic and Optoelectronic Properties}, volume={29}, ISSN={["1616-3028"]}, DOI={10.1002/adfm.201806977}, abstractNote={Abstract}, number={5}, journal={ADVANCED FUNCTIONAL MATERIALS}, author={Carpenter, Joshua H. and Ghasemi, Masoud and Gann, Eliot and Angunawela, Indunil and Stuard, Samuel J. and Rech, Jeromy James and Ritchie, Earl and Brendan T. O'Connor and Atkin, Joanna and You, Wei and et al.}, year={2019}, month={Feb} }
 @article{ghasemi_hu_peng_rech_angunawela_carpenter_stuard_wadsworth_mcculloch_you_et al._2019, title={Delineation of Thermodynamic and Kinetic Factors that Control Stability in Non-fullerene Organic Solar Cells}, volume={3}, ISSN={["2542-4351"]}, DOI={10.1016/j.joule.2019.03.020}, abstractNote={Although non-fullerene small molecular acceptors (NF-SMAs) are dominating current research in organic solar cells (OSCs), measurements of thermodynamics drivers and kinetic factors determining their morphological stability are lacking. Here, we delineate and measure such factors in crystallizable NF-SMA blends and discuss four model systems with respect to their meta-stability and degree of vitrification. We determine for the first time the amorphous-amorphous phase diagram in an NF-SMA system and show that its deep quench depth can result in severe burn-in degradation. We estimate the relative phase behavior of four other materials systems. Additionally, we derive room-temperature diffusion coefficients and conclude that the morphology needs to be stabilized by vitrification corresponding to diffusion constants below 10−22 cm2/s. Our results show that to achieve stability via rational molecular design, the thermodynamics, glass transition temperature, diffusion properties, and related structure-function relations need to be more extensively studied and understood.}, number={5}, journal={JOULE}, author={Ghasemi, Masoud and Hu, Huawei and Peng, Zhengxing and Rech, Jeromy James and Angunawela, Indunil and Carpenter, Joshua H. and Stuard, Samuel J. and Wadsworth, Andrew and McCulloch, Iain and You, Wei and et al.}, year={2019}, month={May}, pages={1328–1348} }
 @article{hu_ye_ghasemi_balar_rech_stuard_you_brendan t. o'connor_ade_2019, title={Highly Efficient, Stable, and Ductile Ternary Nonfullerene Organic Solar Cells from a Two-Donor Polymer Blend}, volume={31}, ISSN={["1521-4095"]}, url={https://publons.com/wos-op/publon/18518240/}, DOI={10.1002/adma.201808279}, abstractNote={Abstract}, number={17}, journal={ADVANCED MATERIALS}, publisher={Wiley}, author={Hu, Huawei and Ye, Long and Ghasemi, Masoud and Balar, Nrup and Rech, Jeromy James and Stuard, Samuel J. and You, Wei and Brendan T. O'Connor and Ade, Harald}, year={2019}, month={Apr} }
 @article{hu_oswald_stuard_nahid_zhou_williams_guo_yan_hu_chen_et al._2019, title={Synthetic control over orientational degeneracy of spacer cations enhances solar cell efficiency in two-dimensional perovskites}, volume={10}, ISSN={["2041-1723"]}, DOI={10.1038/s41467-019-08980-x}, abstractNote={Abstract}, journal={NATURE COMMUNICATIONS}, author={Hu, Jun and Oswald, Iain W. H. and Stuard, Samuel J. and Nahid, Masrur Morshed and Zhou, Ninghao and Williams, Olivia F. and Guo, Zhenkun and Yan, Liang and Hu, Huamin and Chen, Zheng and et al.}, year={2019}, month={Mar} }
 @article{lin_fang_zhao_shao_stuard_nahid_ade_wang_shield_zhou_et al._2019, title={Unveiling the operation mechanism of layered perovskite solar cells}, volume={10}, ISSN={["2041-1723"]}, DOI={10.1038/s41467-019-08958-9}, abstractNote={Abstract}, journal={NATURE COMMUNICATIONS}, author={Lin, Yun and Fang, Yanjun and Zhao, Jingjing and Shao, Yuchuan and Stuard, Samuel J. and Nahid, Masrur Morshed and Ade, Harald and Wang, Qi and Shield, Jeffrey E. and Zhou, Ninghao and et al.}, year={2019}, month={Mar} }