Enhanced Photovoltaic Performance of Polymer Solar Device by Inserting Nanocrystal Titanium Oxide Interlayer
Enhanced Photovoltaic Performance of Polymer Solar Device by Inserting Nanocrystal Titanium Oxide Interlayer
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DOI：
10.1143/jjap.51.090203
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发表时间：
2012-08
影响因子：
1.5
通讯作者：
K. Sasaki;T. Yamanari;Syogo Takano;Y. Yoshida;Y. Ueda
中科院分区：
文献类型：
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作者：
K. Sasaki;T. Yamanari;Syogo Takano;Y. Yoshida;Y. Ueda
为了提高聚合物太阳能器件的功率转换效率（PCE），我们引入了一种高结晶度的纳米晶二氧化钛层（nc - TiO₂层），它是通过旋涂预结晶二氧化钛纳米粒子的分散液形成的。与通过常规低温溶胶 - 凝胶法形成的TiOx层相比，nc - TiO₂层更容易形成且具有更高的重现性。通过插入nc - TiO₂层，功率转换效率从2.70%显著提高到3.91%。nc - TiO₂层比TiOx层能更有效地降低内阻；因此，nc - TiO₂层可作为一种有效的空穴阻挡层和光学间隔层。
To improve the power conversion efficiency (PCE) of polymer solar devices, we introduced a highly crystalline nanocrystal titanium oxide layer (nc-TiO2 layer) that was formed by spin-coating a dispersed liquid of precrystallized titanium oxide nanoparticles. The nc-TiO2 layer can be formed more easily and with a higher reproducibility than the TiOx layer formed by a conventional low-temperature sol–gel method. By inserting the nc-TiO2 layer, the PCE was significantly improved from 2.70 to 3.91%. The nc-TiO2 layer enabled a larger decrease in internal resistance than the TiOx layer; thus, the nc-TiO2 layer acts as an effective hole-blocking layer and optical spacer.