Surface structure of quasi-2D perovskite PEA2mMAn-2mPbnI3n (n e m)

被引：1
作者：
Mirzehmet, Abduheber [1 ]
Ohtsuka, Tomoki [2 ]
Rahman, Syed A. Abd. [2 ]
Aihara, Takumi [2 ]
Kamarudin, Muhammad Akmal [3 ]
Sahamir, Shahrir Razey [3 ]
Hayase, Shuzi [3 ]
Yuyama, Tomoki [2 ]
Kruger, Peter [4 ,5 ]
Yoshida, Hiroyuki [4 ,5 ]
机构：
[1] Chiba Univ, Grad Sch Adv Integrat Sci, Chiba 2638522, Japan
[2] Chiba Univ, Grad Sch Sci & Engn, Chiba 2638522, Japan
[3] Univ Electrocommun, Info Powered Energy Syst Res Ctr I PERC, Tokyo 1828585, Japan
[4] Chiba Univ, Grad Sch Engn, Chiba 2638522, Japan
[5] Chiba Univ, Mol Chiral Res Ctr, Chiba 2638522, Japan
来源：
APPLIED PHYSICS EXPRESS | 2021年 / 14卷 / 03期
关键词：
quasi-2D perovskite solar cell; ultraviolet photoelectron spectroscopy; metastable atom electron spectroscopy; surface structure; SOLAR-CELLS; EFFICIENT; CATIONS;
D O I：
10.35848/1882-0786/abe1df
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Quasi-2D perovskites passivate the perovskite surface and improve the lifetime of perovskite solar cells. However, their detailed surface structures have never been reported. We studied the surfaces of the solution-processed quasi-2D PEA(2m)MA(n-2m)Pb(n)I(3n) (PEA: C6H5CH3CH2NH3, MA: CH3NH3) perovskites as well as the 2D perovskite formed on top of 3D MAPbI(3) with the thicknesses relevant to practical solar cell (n 400) using ultraviolet photoelectron and metastable-atom electron spectroscopies. We confirmed that PEA segregates to the surface and that the phenyl group (C6H5) covers the outermost surface of the quasi-2D perovskite. We discuss plausible structures from the concentration dependence of PEA.
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页数：5
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