Formation of a K-In-Se Surface Species by NaF/KF Postdeposition Treatment of Cu(In,Ga)Se2 Thin-Film Solar Cell Absorbers

被引：101

作者：

Handick, Evelyn ^{[1
]}

Reinhard, Patrick ^{[2
]}

Wilks, Regan G. ^{[1
,3
]}

Pianezzi, Fabian ^{[2
]}

Kunze, Thomas ^{[1
]}

Kreikemeyer-Lorenzo, Dagmar ^{[4
,5
]}

Weinhardt, Lothar ^{[4
,5
,6
]}

Blum, Monika ^{[6
]}

Yang, Wanli ^{[7
]}

Gorgoi, Mihaela ^{[3
,8
]}

Ikenaga, Eiji ^{[9
]}

Gerlach, Dominic

Ueda, Shigenori ^{[10
]}

Yamashita, Yoshiyuki

Chikyow, Toyohiro

Heske, Clemens ^{[4
,5
,6
]}

Buecheler, Stephan ^{[2
]}

Tiwari, Ayodhya N. ^{[2
]}

Baer, Marcus ^{[1
,3
,11
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energie GmbH HZB, Renewable Energy, Hahn Meitner Pl 1, D-14109 Berlin, Germany

[2] Empa Swiss Fed Labs Mat & Sci & Technol, Lab Thin Films & Photovolta, Uberlandstr 129, CH-8600 Dubendorf, Switzerland

[3] Helmholtz Zentrum Berlin Mat & Energie GmbH, Energy Mat In Situ Lab Berlin, Albert Einstein Str 15, D-12489 Berlin, Germany

[4] Karlsruhe Inst Technol, Inst Photon Sci & Synchrotron Radiat IPS, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[5] Karlsruhe Inst Technol, Inst Chem Technol & Polymer Chem ITCP, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[6] Univ Nevada, Dept Chem & Biochem, 4505 S Maryland Pkwy, Las Vegas, NV 89154 USA

[7] Lawrence Berkeley Natl Lab, ALS, 1 Cyclotron Rd, Berkeley, CA 94720 USA

[8] Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Nanospectroscopy, Albert Einstein Str 15, D-12489 Berlin, Germany

[9] SPring8 JASRI, 1-1-1 Koto, Sayo, Hyogo 6795198, Japan

[10] NIMS, SPring 8, Synchrotron Xray Stn, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan

[11] Brandenburg Tech Univ Cottbus Senftenberg, Inst Phys & Chem, Pl Deutsch Einheit 1, D-03046 Cottbus, Germany

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 04期

关键词：

chalcopyrite thin-film solar cells; alkali postdeposition treatment; photoelectron spectroscopy; X-ray spectroscopy; chemical surface structure; X-RAY PHOTOELECTRON; ELECTRONIC-STRUCTURE; ANGULAR-DISTRIBUTION; CUINSE2; SPECTROSCOPY; PHOTOEMISSION; ABSORPTION; EFFICIENCY; RANGE; PHOTOABSORPTION;

D O I：

10.1021/acsami.6b11892

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A NaF/KF postdeposition treatment (PDT) has recently been employed to achieve new record efficiencies of Cu(In,Ga)Se-2 (CIGSe) thin film solar cells. We have used a combination of depth-dependent soft and hard X-ray photoelectron spectroscopy as well as soft X-ray absorption and emission spectroscopy to gain detailed insight into the chemical structure of the CIGSe surface and how it is changed by different PDTs. Alkali-free CIGSe, NaF-PDT CIGSe, and NaF/KF-PDT CIGSe absorbers grown by low-temperature coevaporation have been interrogated. We find that the alkali-free and NaF-PDT CIGSe surfaces both display the well-known Cu-poor CIGSe chemical surface structure. The NaF/KF-PDT, however, leads to the formation of bilayer structure in which a K-In-Se species covers the CIGSe compound that in composition structure of the alkali-free and NaF-PDT absorber. is identical to the chalcopyrite structure of the alkali-free and NaF-PDT absorber.

引用

页码：3581 / 3589

页数：9

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