论文标题
$ mg_xzn_ {1-x} o $联系$ cuga_3se_5 $吸收器用于光伏和光电化学设备
$Mg_xZn_{1-x}O$ contact to $CuGa_3Se_5$ absorber for photovoltaic and photoelectrochemical devices
论文作者
论文摘要
$ cuga_3se_5 $是一种有前途的候选材料，具有宽带隙，用于串联光伏（PV）和光电化学（PEC）设备的宽带间隙。但是，由于其最低传导带的位置较高，因此与其他沙尔卡泊岩吸收器一起使用的传统CD接触层不适合$ CUGA_3SE_5 $。 $ mg_xzn_ {1-x} o $是一种透明的氧化物，具有可调的带隙和传导带位置作为镁组成的函数，但其直接应用受到$ CUGA_3SE_3SE_5 $表面氧化的阻碍。在这里，将$ mg_xzn_ {1-x} O $研究为接触（n型缓冲或窗户）材料，供$ cuga_3se_5 $吸收器预测，以$ cd^{2+} $解决方案进行了预处理，并且在10 mm hexaamminaruthenium（iiii is eeltole coplient in of $ cd^{2+} $ solutions $ cd^{2+} $ solutive os to nigess tose tose tose tose nountation toldigits yspections topections toldents toldent of tose。 $ cd^{2+} $表面处理改变了$ cuga_3se_5 $表面的化学成分和电子结构，如光电光谱测量所示。 $ cuga_3se_5 $吸收器具有$ cd^{2+} $处理的表面在固态测试结构中的表面取决于$ mg_xzn_ {1-x} o $ y layer中的Zn/mg比率。接近1 V的测得的开路电压对于用$ CUGA_3SE_5 $/$ MG_XZN_ {1-x} o $ $ $ top cells进行串联PEC水分裂有希望。
$CuGa_3Se_5$ is a promising candidate material with wide band gap for top cells in tandem photovoltaic (PV) and photoelectrochemical (PEC) devices. However, traditional CdS contact layers used with other chalcopyrite absorbers are not suitable for $CuGa_3Se_5$ due to the higher position of its conduction band minimum. $Mg_xZn_{1-x}O$ is a transparent oxide with adjustable band gap and conduction band position as a function of magnesium composition, but its direct application is hindered by $CuGa_3Se_5$ surface oxidation. Here, $Mg_xZn_{1-x}O$ is investigated as a contact (n-type buffer or window) material to $CuGa_3Se_5$ absorbers pretreated in $Cd^{2+}$ solution, and an onset potential close to 1 V vs RHE in 10 mM hexaammineruthenium (III) chloride electrolyte is demonstrated. The $Cd^{2+}$ surface treatment changes the chemical composition and electronic structure of the $CuGa_3Se_5$ surface, as demonstrated by photoelectron spectroscopy measurements. The performance of $CuGa_3Se_5$ absorber with $Cd^{2+}$ treated surface in the solid-state test structure depends on the Zn/Mg ratio in the $Mg_xZn_{1-x}O$ layer. The measured open circuit voltage close to 1 V is promising for tandem PEC water splitting with $CuGa_3Se_5$/$Mg_xZn_{1-x}O$ top cells.
