<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ferhati Hichem</style></author><author><style face="normal" font="default" size="100%">Djeffal Fayçal</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Exceeding 30% efficiency for an environment-friendly tandem solar cell based on earth-abundant Se/CZTS materials, ISSN / e-ISSN 1386-9477 / 1873-1759</style></title><secondary-title><style face="normal" font="default" size="100%">Physica E: Low-dimensional Systems and Nanostructures </style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2019</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S1386947718317144</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">Volume 109</style></volume><pages><style face="normal" font="default" size="100%">pp 52-58</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In this paper, a new&amp;nbsp;&lt;em&gt;Se&lt;/em&gt;/&lt;em&gt;CZTSSe&lt;/em&gt;&amp;nbsp;tandem solar cell architecture is proposed as a viable approach to reach ultrahigh efficiency values at low fabrication cost. The proposed tandem design consists of a&amp;nbsp;&lt;em&gt;Se&lt;/em&gt;-based top cell with&amp;nbsp;&lt;em&gt;Ti&lt;/em&gt;&amp;nbsp;intermediate ultra-thin metallic layers (&lt;em&gt;MLs&lt;/em&gt;) and a&amp;nbsp;&lt;em&gt;CZTS&lt;/em&gt;&amp;nbsp;bottom cell with graded band-gap aspect. The role of the introduced design amendments in achieving the dual-benefit of enhanced optical behavior and reduced recombination losses is investigated by means of an accurate numerical modeling. Moreover, a comprehensive study which involves the impact of design parameters such as the&amp;nbsp;&lt;em&gt;MLs&lt;/em&gt;&amp;nbsp;position and the&amp;nbsp;&lt;em&gt;CZTSSe&lt;/em&gt;&amp;nbsp;band-gap profile on the device performance is carried out. Moreover, Particle Swarm Optimization (&lt;em&gt;PSO&lt;/em&gt;)-based metaheuristic technique is used to boost up the&amp;nbsp;&lt;em&gt;Se&lt;/em&gt;/&lt;em&gt;CZTSSe&lt;/em&gt;&amp;nbsp;tandem cell efficiency by identifying both the suitable position of the introduced ultrathin&amp;nbsp;&lt;em&gt;MLs&lt;/em&gt;&amp;nbsp;and the appropriate&amp;nbsp;&lt;em&gt;CZTSSe&lt;/em&gt;&amp;nbsp;band-gap profile. It is found that the adopted optimization approach pinpoints a new path toward achieving over 30% efficiency, not only it provides the possibility to reduce interface recombination effects by optimizing the band offset at the buffer/absorber interfaces but also enables selecting the most favorable design configuration associated with enhanced optical behavior. This makes the optimized&amp;nbsp;&lt;em&gt;Se/CZTSSe&lt;/em&gt;&amp;nbsp;tandem solar cell potential alternative for providing high-efficiency and stable tandem solar cell.</style></abstract></record></records></xml>