题目： | dual-site molecular dipole enables tunable interfacial field toward efficient and stable perovskite solar cells |
作者： | junwei shi1,2, muhammad waqas samad1, fangchao li1, chenxi guo1, cheng liu1, junjun guo1, yong zhang2, jie zeng2, deng wang2, wanli ma1,3, baomin xu2*, and jianyu yuan1,4* |
单位： | 1institute of functional nano & soft materials (funsom), soochow university, suzhou 215123, p. r. china. 2department of materials science and engineering, southern university of science and technology, shenzhen 518055, p. r. china. 3jiangsu key laboratory for carbon-based functional materials & devices, soochow university, suzhou 215123, p. r. china. 4jiangsu key laboratory of advanced negative carbon technologies, soochow university, suzhou 215123, p. r. china. |
摘要： | the interfacial management in perovskite solar cells (pscs), including mitigating the carrier transport barrier and suppressing non-radiative recombination, still remains a significant challenge for efficiency and stability enhancement. herein, by screening a family of fluorine (f) terminated dual-site organic dipole molecules, the study aims to gain insight into the molecular dipole array toward tunable interfacial field. both experimental and theoretical results reveal that these functional interfacial dipole molecules can effectively anchor on perovskite surface through lewis acid-base interaction. in addition, the tailored side-chain with terminated f atoms allows for altering and constructing a well matched perovskite/spiro-ometad interfacial contact. as a result, the inserting dual-site organic dipole array effectively modulates the interface to deliver a gradient energy level alignment, facilitating carrier extraction and transport. the optimal dual-site dipole trifluoro-methanesulfonamide mediated n-i-p pscs achieve the highest efficiency of 25.47%, together with enhanced operational stability under 1000 h of the simulated 1-sun illumination exposure. these findings are believed to provide insight into the design of dual-site molecular dipole with sufficient interfacial tunability for perovskite-based optoelectronic devices. |
影响因子： | 27.4 |
分区情况： | 一区 |
链接： | 责任编辑：杜欣 |
