Organic photovoltaic cell with 17% efficiency and superior processability     

Yong Cui  Huifeng Yao  Ling Hong  Tao Zhang  Yabing Tang  Baojun Lin  Kaihu Xian  Bowei Gao  Cunbin An  Pengqing Bi  Wei Ma  Jianhui Hou 《国家科学评论(英文版)》2020,7(7):1239

The development of organic photoactive materials, especially the newly emerging non-fullerene electron acceptors (NFAs), has enabled rapid progress in organic photovoltaic (OPV) cells in recent years. Although the power conversion efficiencies (PCEs) of the top-performance OPV cells have surpassed 16%, the devices are usually fabricated via a spin-coating method and are not suitable for large-area production. Here, we demonstrate that the fine-modification of the flexible side chains of NFAs can yield 17% PCE for OPV cells. More crucially, as the optimal NFA has a suitable solubility and thus a desirable morphology, the high efficiencies of spin-coated devices can be maintained when using scalable blade-coating processing technology. Our results suggest that optimization of the chemical structures of the OPV materials can improve device performance. This has great significance in larger-area production technologies that provide important scientific insights for the commercialization of OPV cells.  相似文献   

编辑工作与受众注意   总被引：1，自引：0，他引：1  

范艳军 《信阳师范学院学报(哲学社会科学版)》2003,23(4):79-81

媒介对受众发生作用，正是从引发受众注意开始的。受众注意是传播活动中重要的心理资源，在媒体激烈的市场竞争中，谁能更有效地开发、更充分地利用这一资源，谁就握住了获胜的一只关键筹码。根据注意有无预定目的和意志努力，可把注意分为无意注意、有意注意、有意后注意。编辑要通过精心的策划、筛选、优化、组合，使受众有意注意和无意注意达到平衡，协调发挥作用，才能达到理想的传播效果。  相似文献   

Control over π-π stacking of heteroheptacene-based nonfullerene acceptors for 16% efficiency polymer solar cells     

Yunlong Ma  Dongdong Cai  Shuo Wan  Pan Yin  Pengsong Wang  Wenyuan Lin  Qingdong Zheng 《国家科学评论(英文版)》2020,7(12):1886

Nonfullerene acceptors are being investigated for use in polymer solar cells (PSCs), with their advantages of extending the absorption range, reducing the energy loss and therefore enhancing the power conversion efficiency (PCE). However, to further boost the PCE, mobilities of these nonfullerene acceptors should be improved. For nonfullerene acceptors, the π–π stacking distance between cofacially stacked molecules significantly affects their mobility. Here, we demonstrate a strategy to increase the mobility of heteroheptacene-based nonfullerene acceptors by reducing their π–π stacking distances via control over the bulkiness of lateral side chains. Incorporation of 2-butyloctyl substituents into the nonfullerene acceptor (M36) leads to an increased mobility with a reduced π–π stacking distance of 3.45 Å. Consequently, M36 affords an enhanced PCE of 16%, which is the highest among all acceptor-donor-acceptor-type nonfullerene acceptors to date. This strategy of control over the bulkiness of side chains on nonfullerene acceptors should aid the development of more efficient PSCs.  相似文献   

苏文贺启受主考二则     

张志烈 《乐山师范学院学报》2004,19(11):1-5

苏轼贺启字的某些篇目，其受主疑不能明，学术界有不同说法，本对《贺韩丞相再人启》、《贺吕副枢启》之受主进行考辨，通过本解析，探求内证，结论坚挺，有说服力。  相似文献   

现代国际技术转移的涵义和特点   总被引：5，自引：0，他引：5  

郑兵 《大连大学学报》2003,24(3):73-75

技术转移是指技术从供方向受方移动的过程,并以受方拿到该技术为终点,该过程可以发生在不同地域之间,也可以发生在不同领域之间。现代技术转移的主要特点表现为技术转移方式的多样性、技术转移的多元性、技术转移的管制性和技术转移的软化性四个方面。  相似文献