硫源种类对微波合成CZTS颗粒与薄膜性能的影响
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Effect of Sulfur Source on Properties of CZTS Particles by Microwave Irradiation Assisted Solvothermal Method and Thin Films
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    摘要:

    研究不同硫源对微波液相合成的Cu2ZnSnS4(CZTS)纳米颗粒尺寸及形貌的影响。结果表明:当采用硫脲作为硫源时,所制备的CZTS纳米颗粒为平均尺寸500 nm的球状结构纳米颗粒;采用L半胱氨酸作为硫源所制备的CZTS纳米颗粒为50 nm的空心球状纳米颗粒;而当使用硫代乙酰胺作为硫源制备CZTS纳米颗粒,其平均尺寸仅为3 nm。采用 平均尺寸为500 nm或50 nm的纳米颗粒制备墨水,将墨水旋涂到衬底上时,其致密性很差,明显存在许多孔洞。当采用平均尺寸为3 nm的纳米颗粒制作墨水,并将其制成薄膜时,薄膜致密性与均匀性都比较好。将最佳的预制薄膜进行硫化处理,其结晶性明显提高,并得到转化效率为2.1%的CZTS太阳电池。

    Abstract:

    The influence of different sulfur sources on the size and morphology of Cu2ZnSnS4(CZTS) nanoparticles is studied by the microwave irradiation assisted solvothermal method. The results show that:500 nm sphere-like CZTS nanoparticles are synthesized with thiourea as a sulfur source. The 50 nm hollow sphere-like CZTS nanoparticles are obtained using L-cysteine as a sulfur source. And the average size of CZTS nanoparticles with thioacetamide as a sulfur source is only 3 nm. The nano-ink is firstly prepared by large size nanoparticles (average size of 500 nm or 50 nm). When this nano-ink is used to prepare thin film by spin-coating, the as-obtained thin film has poor density and many holes. However, when the nano-ink prepared by small size nanoparticles (average size of 3 nm) is used to prepare thin film, the thin film with best density and uniformity is obtained. Moreover,when the best as-prepared thin film is sulfurized,its crystallinity is obviously improved, and the CZTS solar cell with 2.1% efficiency is obtained.

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王威 沈鸿烈 姚函妤 等.硫源种类对微波合成CZTS颗粒与薄膜性能的影响[J].南京航空航天大学学报,2015,47(5):665-671

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  • 在线发布日期: 2015-11-11
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