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RISS 인기검색어
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- 저자 : Md. Abdul Kuddus Sheikh (검색결과 2 건)
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Md. Abdul Kuddus Sheikh,압둘라임,손싱,Jae-Hun Kim,Kyeong-Sik Min,Jiyoung Kim,Jaegab Lee 대한금속·재료학회 2018 ELECTRONIC MATERIALS LETTERS Vol.14 No.6
CdS synthesized by the chemical bath method at 70 °C, has been used as an electron transport layer in the planar structure ofthe perovskite solar cells. A two-step spin process produced a mixed halide perovskite of CH 3 NH 3 PbI 3−x Cl x and a mixtureof PbCl 2 and PbI 2 was deposited on CdS, followed by a sub-sequential reaction with MAI (CH 3 NH 3 I). The added PbCl 2 toPbI 2 in the fi rst spin-step aff ected the structure, orientation, and shape of lead halides, which varied depending on the contentof Cl. A small amount of Cl enhanced the surface morphology and the preferred orientation of PbI 2 , which led to largeand uniform grains of perovskite thin fi lms. In contrast, the high content of Cl produces a new phase PbICl in addition toPbI 2 , which leads to the small and highly uniform grains of perovskites. An improved surface coverage of perovskite fi lmswith the large and uniform grains maximized the performance of perovskite solar cells at 0.1 molar ratio of PbCl 2 to PbI 2 . The depth profi ling of elements in both lead halide fi lms and mixed halide perovskite fi lms were measured by Rutherfordbackscattering spectroscopy, revealing the distribution of chlorine along with the thickness, and providing the basis for themechanism for enhanced preferred orientation of lead halide and the microstructure of perovskites.
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CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> nanocubes-array for solar cell application
Swain, Bhabani Sankar,Sheikh, Md. Abdul Kuddus,Singh, Son,Abdur, Rahim,Jeong, Daekyun,Lee, Jaegab Elsevier 2018 Materials science in semiconductor processing Vol.74 No.-
<P><B>Abstract</B></P> <P>Methyl-ammonium lead bromide (MAPbBr<SUB>3</SUB>) is currently studying due to its potential application to high open circuit voltage photovoltaic device. Due to the limited solubility of methyl ammonium bromide (MABr) in iso-propyl alcohol (IPA), the MAPbBr<SUB>3</SUB> was only fabricated by one step (1-step) spin coating process. In this article, we alternatively used ethanol and methanol as solvent to dissolve MABr to fabricate MAPbBr<SUB>3</SUB> films by two steps (2-steps) spin coating process. As a result, we observed a dense, closed stacked and aligned perovskite nanocubes array using a varying concentration of MABr and waiting time. Our best device with an architecture of FTO/TiO<SUB>2</SUB>/MAPbBr<SUB>3</SUB>/Spiro-OMeTAD/Au shows a current density of 9.31mA/cm<SUP>2</SUP>, open circuit voltage of 1.05V, and fill factor of 0.58 with a power conversion efficiency of 5.70%. We were optimistic that these MAPbBr<SUB>3</SUB> nanocube arrays would be applicable to solar cell as well as other optoelectronic devices such as photodetector, light emitting diode and X-ray scintillator.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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