<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Cheng-YingChen</style></author><author><style face="normal" font="default" size="100%">Bandiyah Sri Aprillia</style></author><author><style face="normal" font="default" size="100%">Wei-ChaoChen</style></author><author><style face="normal" font="default" size="100%">Yen-Ching Teng</style></author><author><style face="normal" font="default" size="100%">Chih-Yuan Chiu</style></author><author><style face="normal" font="default" size="100%">Ruei-San Chen</style></author><author><style face="normal" font="default" size="100%">Jih-Shang Hwang</style></author><author><style face="normal" font="default" size="100%">Kuei-Hsien Chen</style></author><author><style face="normal" font="default" size="100%">Li-Chyong Chen</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Above 10% efficiency earth-abundant Cu2ZnSn(S,Se)4 solar cells by introducing alkali metal fluoride nanolayers as electron-selective contacts</style></title><secondary-title><style face="normal" font="default" size="100%">Nano Energy</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Alkali metal fluoride</style></keyword><keyword><style  face="normal" font="default" size="100%">CZTSSe</style></keyword><keyword><style  face="normal" font="default" size="100%">Electron-selective contacts</style></keyword><keyword><style  face="normal" font="default" size="100%">Kesterite</style></keyword><keyword><style  face="normal" font="default" size="100%">Open-circuit voltage deficit</style></keyword><keyword><style  face="normal" font="default" size="100%">Solar cells</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S2211285518304233</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">51</style></volume><pages><style face="normal" font="default" size="100%">597 - 603</style></pages><isbn><style face="normal" font="default" size="100%">2211-2855</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The present investigation mainly addresses the open circuit voltage (Voc) issue in kesterite based Cu2ZnSn(S,Se)4 solar cells by simply introducing alkali metal fluoride nanolayers (~ several nm NaF, or LiF) to lower the work functions of the front ITO contacts without conventional hole-blocking ZnO layers. Kelvin probe measurements confirmed that the work function of the front ITO decreases from 4.82 to 3.39 and 3.65 eV for NaF and LiF, respectively, resulting in beneficial band alignment for electron collection and/or hole blocking on top electrodes. Moreover, a 10.4% power conversion efficiency (~ 11.5% in the cell effective area) CZTSSe cell with improved Voc of up to 90 mV has been attained. This demonstration may provide a new direction of further boosting the performance of copper chalcogenide based solar cells as well.&lt;/p&gt;
</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;n/a&lt;/p&gt;
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