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Sub-stochiometric MoOx by radio-frequency magnetron sputtering as hole-selective passivating contacts for silicon heterojunction solar cells
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Xiufang Yang 《中国物理 B》2022,31(9):98401-098401
The silicon heterojunction (SHJ) solar cell has long been considered as one of the most promising candidates for the next-generation PV market. Transition metal oxides (TMOs) show good carrier selectivity when combined with c-Si solar cells. This has led to the rapid demonstration of the remarkable potential of TMOs (especially MoOx) with high work function to replace the p-type a-Si:H emitting layer. MoOx can induce a strong inversion layer on the interface of n-type c-Si, which is beneficial to the extraction and conduction of holes. In this paper, the radio-frequency (RF) magnetron sputtering is used to deposit MoOx films. The optical, electrical and structural properties of MoOx films are measured and analyzed, with focus on the inherent compositions and work function. Then the MoOx films are applied into SHJ solar cells. When the MoOx works as a buffer layer between ITO/p-a-Si:H interface in the reference SHJ solar cell, a conversion efficiency of 19.1% can be obtained. When the MoOx is used as a hole transport layer (HTL), the device indicates a desirable conversion efficiency of 17.5%. To the best of our knowledge, this current efficiency is the highest one for the MoOx film as HTL by RF sputtering. 相似文献
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Hexagonal boron nitride hollow capsules with collapsed surfaces:Chemical vapor deposition with single-source precursor ammonium fluoroborate
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SBA-15(mesoporous SiO_2) is used to stabilize and transfer F-in the NH_4BF_4 CVD reaction for the first time, and a large-scale crystalline h-BN phase can be prepared. We successfully fabricate hollow h-BN capsules with collapsed surfaces in our designed NH_4BF_4 CVD system. Optimum temperature conditions are obtained, and a detailed formation mechanism is further proposed. The successful SBA-15-assisted NH_4BF_4 CVD route is of importance and enriches the engineering technology in the h-BN single-source CVD reaction. 相似文献
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