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- 저자 : Nastaran A. Tehrani (검색결과 1 건)
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Rouhollah Khosroshahi,Nastaran A. Tehrani,Mozhdeh Forouzandeh,Fatemeh Behrouznejad,Nima Taghavinia,Mojtaba Bagherzadeh 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
In this work, synthesis of CuIn0.75Ga0.25S2 (CIGS) nanoparticles, the formation of stable dispersion, depositionof high-quality films and, fabrication of thin-film Perovskite solar cells are reported. The stability ofnanoparticle ink is crucial in the formation of device-quality films. The chalcogenide-based materials arewidely used in thin-film solar cells; in particular, Cu(In,Ga)S2 are used as an absorber and hole transportinglayer. In the present study, the nanoparticles of about 20 nm size and bandgap of 1.5 eV are synthesizedusing a heat-up method. A variety of solvents are used as dispersing media and the stability of theinks is evaluated by precise optical monitoring. We observe a clear dependence of ink stability to thepolarity index of the solvent, where the best stability occurs at a polarity index of about 0.26–0.36, correspondingto a range of solvents including chloroform. The thin films that are spin-coated using CIGSchloroform ink show large cracks, presumably due to the high vapor pressure of chloroform andevaporation-induced stress in the film. We resolve this problem through low-temperature deposition,which resulted in highly uniform pin-hole and crack-free films. Finally, the optimum deposition conditionis used to fabricate perovskite solar cells having about 16.5% efficiency with CIGS as a hole transportlayer.
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