具有电子选择性TiO接触的19.2%效率的磷化铟异质结太阳能电池。
19.2% Efficient InP Heterojunction Solar Cell with Electron-Selective TiO Contact.
作者信息
Yin Xingtian, Battaglia Corsin, Lin Yongjing, Chen Kevin, Hettick Mark, Zheng Maxwell, Chen Cheng-Ying, Kiriya Daisuke, Javey Ali
机构信息
Electrical Engineering and Computer Sciences Department, University of California , Berkeley, California 94720, United States ; Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States ; Electronic Materials Research Laboratory, Xi'an Jiaotong University , Xi'an, 710049 Shaanxi, People's Republic of China.
Electrical Engineering and Computer Sciences Department, University of California , Berkeley, California 94720, United States ; Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
出版信息
ACS Photonics. 2014 Dec 17;1(12):1245-1250. doi: 10.1021/ph500153c. Epub 2014 Sep 25.
We demonstrate an InP heterojunction solar cell employing an ultrathin layer (∼10 nm) of amorphous TiO deposited at 120 °C by atomic layer deposition as the transparent electron-selective contact. The TiO film selectively extracts minority electrons from the conduction band of p-type InP while blocking the majority holes due to the large valence band offset, enabling a high maximum open-circuit voltage of 785 mV. A hydrogen plasma treatment of the InP surface drastically improves the long-wavelength response of the device, resulting in a high short-circuit current density of 30.5 mA/cm and a high power conversion efficiency of 19.2%.
我们展示了一种采用通过原子层沉积在120°C下沉积的超薄（约10nm）非晶TiO作为透明电子选择性接触的InP异质结太阳能电池。由于价带偏移大，TiO薄膜从p型InP的导带中选择性地提取少数载流子电子，同时阻挡多数载流子空穴，从而实现了785mV的高最大开路电压。对InP表面进行氢等离子体处理极大地改善了器件的长波长响应，产生了30.5mA/cm的高短路电流密度和19.2%的高功率转换效率。
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