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.

引用

页数：5

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