Different mechanisms of improving CH_(3)NH_(3)PbI_(3) perovskite solar cells brought by fluorinated or nitrogen doped graphdiyne  

作　　者：Huan Huang Bing Liu Dan Wang Rongli Cui Xihong Guo Ying Li Shouwei Zuo Zi Yin Huanhua Wang Jing Zhang Hui Yuan Lirong Zheng Baoyun Sun 

机构地区：[1]CAS Key Lab for Biomedical Effects of Nanomaterials&Nanosafety,Institute of High Energy Physics,Chinese Academy of Science,Beijing 100049,China [2]Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2022年第1期573-580,共8页纳米研究（英文版）

基　　金：supported financially by the National Key Research and Development Program of China(Nos.2018YFA0703504 and 2017YFA0403403);the National Basic Research Program of China(No.2016YFA0203200);the National Natural Science Foundation of China(Nos.21971242,11705211,and U1532104);Young Scientist Innovative Foundation of IHEP(Nos.E05469U2 and Y95461C).

摘　　要：Fluorinated and nitrogen-doped graphdiyne(F/N-GDY)have been used in the active layer of perovskite solar cells(PSCs)for the first time.The introduction of heteroatoms turns out to be an effective method for boosted solar cells performance,which increases by 32.8%and 33.0%,better than the pristine or GDY doped PSCs.The enhanced performance can be attributed firstly to the superiority of F/N-GDY originated from the unique structure and optoelectronic properties of GDY.Then,both can further reduce surface defects and improve surface and bulk crystallinity than pristine GDY.What's more,efficiency increase caused by F-GDY is mainly attributed to the improvement of fill factor(FF),while the higher short-circuit current(Jsc)plays more important role by N-GDY doping.Most importantly,the detailed mechanism brought about by doping of F-GDY or N-GDY is expounded by systematical characterizations,especially the synchrotron radiation technique.Doping of F-GDY causes Pb and forms new Pb-F bonds between F-GDY and Pb ions.Doping of N-GDY or GDY brings about Pb(N-GDY doping induces more deviation than that of GDY due to the participation of imine N),improving its electron density and conductivity.

关 键 词：perovskite solar cells graphdiyne grazing incidence X-ray diffraction(GIXRD) X-ray absorption fine structure(XAFS) synchrotron radiation technique 

分 类 号：TM914.4[电气工程—电力电子与电力传动]