Cover Image, Volume 26, Issue 3

Shen, Yu; Kang, Jeong-yoon; Baek, Gun Yeol; Bae, Jin A; Yang, So Hyun; Jeon, Chan‐Wook

doi:10.1002/pip.2998

Cited by 1 publication

(1 citation statement)

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“…Thus, there is a need for a simple and green method to synthesize chalcopyrite-phase CIS materials because this phase has a higher light absorption coefficient, is stable, and provides protection against incident radiation [15]. Among the CIS synthesis methods, liquid-phase synthesis been investigated [16][17][18][19][20] due to its ability to control chemical composition ratios, simple doping process, and low preparation environment requirements.…”

Section: Introductionmentioning

confidence: 99%

SYNTHESIS OF CHALCOPYRITE CuInSe2 (CIS) NANOSHEETS USING VITAMIN C AS AN ADJUVANT AND PHOTOELECTRIC PROPERTIES OF CIS THIN FILMS

CHEN¹,

ZHANG²,

WAN³

et al. 2020

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To prepare chalcopyrite-phase CuInSe2 (CIS) nanosheets, green reductants were screened by using them to reduce the valence state of copper sources using a N,N-dimethylformamide/triethylene glycol(DMF/TEG) mixed solvent. CuCl was used as the copper source, indium chloride as the indium source, selenium powder as the selenium source, TEG as the anionic solvent, DMF as the cationic solvent, and Vitamin C (Vc) as the reductant. The influences of reaction temperature, reaction time, and Vc amount on the phase and composition of synthetic CuInSe2 nanosheets were examined, and the results were used to propose a reaction mechanism. The optional reaction conditions were a reaction temperature of 260 oC, a reaction time of 16 h, and a Vc amount of 0.20 g. Chalcopyrite-phase CIS nanosheets were synthesized with particle sizes of 14 µm and a uniform particle size distribution. CuInSe2 thin films displayed good surface smoothness and compactness in a 5.5 µm spin-cast film. The thin film showed a bandgap of 1.08 eV, a carrier concentration of 5.26×1016 cm-3 , and a carrier mobility of 150.41 cm2 V -1 S -1 . The results showed that this strategy can be used to prepare chalcopyrite-phase CIS which could be used as a photosensitive layer for various optoelectronic devices.

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