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Micro & Nano Letters · 2017 ·Vol. 12 ·期 5 ·285-288 · IF 0.723

Basic cadmium salts as phase-directing agent for the phase and morphology control of metal hydroxychlorides

Hongtao Cui,Li Wang,Yanhong Li,Min Shi

Basic cadmium salts (CdOHCl and Cd(OH)NO 3 ·H 2 O) were used as phase-directing agents to guide the phase development of various metal hydroxychlorides including Cu 2 (OH) 3 Cl, Co 2 (OH) 3 Cl, Zn 5 (OH) 8 Cl 2 (H 2 O), Sn 3 O(OH) 2 Cl 3 and PbOHCl. The simple synthesis procedure includes only one step: solid basic cadmium salt was suspended in aqueous or ethanolic solution of metal salt for 6 h in ambient environment. The separated products from the solution had various morphologies such as sphere, bundle, sheet, hollow sphere and cube. The phase direction behaviour of basic cadmium salts can be attributed to their high reactivity, and most importantly to the structure similarity between basic cadmium salts and metal hydroxychlorides.

CAS / MDL: 64-17-5 10022-68-1 10125-13-0 7790-78-5 7791-13-1 10099-74-8 811-98-3 7646-85-7 75-56-9 10025-69-1 62-55-5 67-64-1

研究领域: 材料科学 · 化学

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ENERGY & FUELS · 2024 · IF 5.2

Exploring New Cadmium Salts to Enhance the Photovoltaic Conversion Efficiency of Cu2ZnSn(S,Se)4 Solar Cells

Haixuan Gao,Chuanhe Ma,Jinhui Zhang,Jinchun Jiang,Ye Chen,Lin Sun,Hailong Wang

In the prior art of CZTSSe solar cells, the traditional cadmium salt (Cd-salt) CdSO4 is widely considered as a common raw material for preparing CdS buffer layers. However, in this study, we systematically demonstrated the phase structure and transmission spectra improvement effect of the other three types of Cd-salts, Cd(NO3)2, CdCl2, and CdAc2, on the CZTSSe/CdS heterojunction (HJT) compared to CdSO4. CZTSSe/CdS HJT prepared by Cd(NO3)2 showed the strongest CdS phonon characteristic peaks at 295.9 and 597.6 cm–1, indicating a pure crystal phase. The transmittance of CdS films prepared by Cd(NO3)2 is 20–35% higher than the other three Cd-salts in the light range of 350–1000 nm, which effectively improved the band gap of the films (2.41 eV) and depressed the photon absorption and scattering. Accordingly, CZTSSe solar cells based on the aforementioned Cd-salts showed that Cd(NO3)2 possessed the best ability to improve the photovoltaic conversion efficiency (PCE), about 5.7% more than the traditional CdSO4 salt. After Sn2+ replaced by Sn4+ in the precursor solution, the PCE of CZTSSe solar cells using Cd(NO3)2 exceeded 10% (Total area = 0.21 cm2, PCE = 10.23%, VOC = 0.485 V, JSC = 31.4 mA/cm2, FF = 67.1%, without MgF2 antireflective layer).

CAS / MDL: 7790-84-3 5743-04-4 7758-89-6 7646-85-7 10025-69-1 10026-06-9 62-56-6

研究领域: 材料科学 · 光伏技术 · 可再生能源 · 半导体物理

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Basic cadmium salts as phase-directing agent for the phase and morphology control of metal hydroxychlorides

Exploring New Cadmium Salts to Enhance the Photovoltaic Conversion Efficiency of Cu2ZnSn(S,Se)4 Solar Cells