Dependence of InGaN solar cell performance on polarization-induced electric field and carrier lifetime
文献类型：期刊论文
| 作者 | Yang, J ; Zhang, SM (张书明); Yang, H(杨辉); Zhang, BS (张宝顺)
|
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2013-09 |
| 卷号 | 22期号:9 |
| 关键词 | nitride materials solar cell polarization |
| 通讯作者 | Zhao, DG |
| 英文摘要 | The effects of Mg-induced net acceptor doping concentration and carrier lifetime on the performance of a p—i—n InGaN solar cell are investigated. It is found that the electric field induced by spontaneous and piezoelectric polarization in the i-region could be totally shielded when the Mg-induced net acceptor doping concentration is sufficiently high. The polarization-induced potential barriers are reduced and the short circuit current density is remarkably increased from 0.21 mA/cm2 to 0.95 mA/cm2 by elevating the Mg doping concentration. The carrier lifetime determined by defect density of i-InGaN also plays an important role in determining the photovoltaic properties of solar cell. The short circuit current density severely degrades, and the performance of InGaN solar cell becomes more sensitive to the polarization when carrier lifetime is lower than the transit time. This study demonstrates that the crystal quality of InGaN absorption layer is one of the most important challenges in realizing high efficiency InGaN solar cells.Considerable effort has been applied to the development of new processes and catalysts for cellulose conversion to valuable platform chemicals. Isosorbide is among the most interesting products as it can be applied as a monomer and building block for the future replacement of fossil resource-based products. A sustainable method of isosorbide production from cellulose is presented in this work. The strategy relies on a bifunctional Ru catalyst supported on mesoporous niobium phosphate in a H2 atmosphere under pressure without further addition of any soluble acid. Over 50?% yield of isosorbide with almost 100?% cellulose conversion can be obtained in 1?h. The large surface area, pore size, and strong acidity of mesoporous niobium phosphate promote the hydrolysis of cellulose and dehydration of sorbitol; additionally, the appropriate size of the supported Ru nanoparticles avoids unnecessary hydrogenolysis of sorbitol. Under a cellulose/catalyst mass ratio of 43.3, the present bifunctional catalyst could be stably used up to six times, with its mesoporous structure well preserved and without detectable Ru leaching into the reaction solution. |
| 收录类别 | SCI ; EI |
| WOS记录号 | WOS:000325006700101 |
| 公开日期 | 2014-01-10 |
| 源URL | [http://ir.sinano.ac.cn/handle/332007/1277]  |
| 专题 | 苏州纳米技术与纳米仿生研究所_纳米器件及相关材料研究部_刘建平团队 |
| 推荐引用方式 GB/T 7714 | Yang, J,Zhang, SM ,Yang, H,et al. Dependence of InGaN solar cell performance on polarization-induced electric field and carrier lifetime[J]. CHINESE PHYSICS B,2013,22(9). |
| APA | Yang, J,Zhang, SM ,Yang, H,&Zhang, BS .(2013).Dependence of InGaN solar cell performance on polarization-induced electric field and carrier lifetime.CHINESE PHYSICS B,22(9). |
| MLA | Yang, J,et al."Dependence of InGaN solar cell performance on polarization-induced electric field and carrier lifetime".CHINESE PHYSICS B 22.9(2013). |
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