【摘要】：為實(shí)現(xiàn)對太陽光的寬波段高效吸收,引入光學(xué)黑洞(optical black hole,OBH)概念,用有限元方法對單納米線太陽電池(SNSCs)進(jìn)行電磁仿真和結(jié)構(gòu)設(shè)計(jì)。剖析了極化模式、OBH尺寸、核殼匹配、折射率階梯分層等因素對OBH SNSCs的陷光和光學(xué)吸收性能的影響。研究表明:較以往介電常數(shù)匹配方式,利用折射率匹配設(shè)計(jì)可進(jìn)一步提高OBH系統(tǒng)的光學(xué)吸收性能;借助微納結(jié)構(gòu)對光波的調(diào)控,可實(shí)現(xiàn)全向?qū)拵Ц咝?從而將OBH應(yīng)用于微納光伏系統(tǒng);進(jìn)一步發(fā)現(xiàn),可通過優(yōu)化內(nèi)核半徑和外殼折射率分布來提高基于OBH的非晶硅(a-Si:H)SNSCs吸收效率,獲得的光電流較傳統(tǒng)無包層a-Si:H SNSCs提升約300%。
[Abstract]:The concept of optical black hole (optical black hole,OBH (optical black hole) is introduced to realize the high efficiency absorption of solar light in wide band. The electromagnetic simulation and structure design of single nanowire solar cell (SNSCs) are carried out by finite element method. The effects of polarization mode, OBH size, core-shell matching and refractive index ladder delamination on the optical and optical absorption properties of OBH SNSCs are analyzed. The results show that the optical absorption performance of OBH system can be further improved by using refractive index matching design compared with the previous dielectric constant matching methods. With the help of the micro / nano structure to control the optical wave, the omni-directional broadband and efficient absorption can be realized, so that the OBH is applied to the micro / nano photovoltaic system. Furthermore, it is found that the absorption efficiency of amorphous silicon (a-Si:H) SNSCs based on OBH can be improved by optimizing the core radius and the refractive index distribution of the shell, and the photocurrent can be increased by about 300% compared with the conventional a-Si:H SNSCs without cladding.
【作者單位】： 蘇州大學(xué)物理與光電.能源學(xué)部;蘇州納米科技協(xié)同創(chuàng)新中心;江蘇省先進(jìn)光學(xué)制造技術(shù)重點(diǎn)實(shí)驗(yàn)室;教育部現(xiàn)代光學(xué)技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目(20133201110021) 國家自然科學(xué)基金重大研究計(jì)劃培育項(xiàng)目(91233119) 中國博士后特別資助基金(2015T80578)
【分類號】：TM914.4

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