Enhanced Hetero-Junction Quality and Performance of Kesterite Solar Cells by Aluminum Hydroxide Nanolayers and Efficiency Limitation Revealed by Atomic-resolution Scanning Transmission Electron Microscopy

被引：6

作者：

Xie, Haibing ^{[1
]}

Sanchez, Yudania ^{[1
]}

Tang, Pengyi ^{[1
,2
,3
]}

Espindola-Rodriguez, Moises ^{[1
]}

Guc, Maxim ^{[1
]}

Calvo-Barrio, Lorenzo ^{[4
,5
]}

Lopez-Marino, Simon ^{[1
]}

Liu, Yu ^{[1
]}

Morante, Joan R. ^{[1
]}

Cabot, Andreu ^{[1
,6
]}

Izquierdo-Roca, Victor ^{[1
]}

Arbiol, Jordi ^{[2
,3
,6
]}

Perez-Rodriguez, Alejandro ^{[1
,5
]}

Saucedo, Edgardo ^{[1
]}

机构：

[1] Catalonia Inst Energy Res IREC, Jardins Dones Negre 1,2a, Barcelona 08930, Spain

[2] CSIC, Catalan Inst Nanosci & Nanotechnol ICN2, Campus UAB, Bellaterra 08193, Catalonia, Spain

[3] Barcelona Inst Sci & Technol BIST, Campus UAB, Bellaterra 08193, Catalonia, Spain

[4] Ctr Cient & Tecnol Univ Barcelona CCiTUB, Lluis Sole & Sabaris 1-3, Barcelona 08028, Spain

[5] Univ Barcelona, Dept Elect, Inst Nanosci Ans Nanotechnol Univ Barcelona IN2UB, E-08028 Barcelona, Spain

[6] Inst Catalana Recerca & Estudis Avancats ICREA, Pg Lluis Co 23, Barcelona 08010, Spain

来源：

SOLAR RRL | 2019年 / 3卷 / 02期

关键词：

Al(OH)(3) nanolayer; atomic-resolution scanning transmission electron microscopy; interface passivation; kesterite; thin film solar cell; POTENTIAL-INDUCED DEGRADATION; BACK CONTACT; THIN-FILMS; INTERMEDIATE LAYER; SECONDARY PHASES; STACKING-FAULTS; SOFTWARE TOOL; STEM-CELL; CU2ZNSNS4; IMPACT;

D O I：

10.1002/solr.201800279

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A strategy for interface engineering of hetero-junctions in kesterite solar cells by using Al(OH)(3) is demonstrated. The hydroxide nanolayers are prepared via a facile and fast wet chemical route, based on an aqueous solution of aluminum chlorides and thioacetamide. Considerable enhancement of open circuit voltage (V-oc) (30-60mV) and fill factor (FF) (10-20%) after this chemical treatment are observed, achieving a champion conversion efficiency of 9.1% and a champion FF of 70% (among the best FF in kesterite solar cells). The functional mechanism is systematically studied by current-voltage, capacitance-voltage, temperature dependence of current-voltage and photoluminescence measurements, which reveal that Al(OH)(3) nanolayers can effectively reduce the interface recombination and largely improve the shunt resistance. Furthermore, atomic resolution high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) evidences the epitaxial relationship of Al(OH)(3) with kesterite and CdS, indicating the benign and effective interface passivation achieved by this chemical treatment. Finally, based on HAADF-STEM and electron energy loss spectroscopy mappings, insights into the efficiency limiting and beneficial factors for CZTSSe solar cells, as well as suggestions to further improve both the bulk and related interfaces are presented.

引用

页数：13