Fabrication of solar cells made with CuInTe2-xSex quantum dots sensitized hierarchical TiO2 sphere having a CuS counter electrode: Dependence on the Te/Se ratio

作者：Buatong Nattha^*; Tang I Ming; Pon On Weeraphat

来源：Materials Letters, 2017, 199: 41-45.

DOI：10.1016/j.matlet.2017.04.033

• Quantum dots
• Hierarchical titanium dioxide
• Copper sulfide counter electrodes
• Copper indium tellurium selenium (CuInTe2-xSex)

In this study, we have succeeded in fabricating quantum dot sensitized solar cells (QDSSC's) which utilize the semiconductor CuInTe2-xSex (of different Te/Se ratios) quantum dots sensitized hierarchical TiO2 sphere (HTS) having CuS as the photoanode. The solar to electric energy conversion performance of the resulting QDSSC depends strongly on the Te/Se ratios in the ternary chalcopyrite compound. In this study, the assembled device exhibiting the highest energy conversion efficiency eta of 3.751% (V-oc = 0.683 V, J(sc) = 11.707 mA cm(-2), FF = 0.516) is the one having CuInTe1.2Se0.8 quantum dots. This value is quite an improvement over those of the CuInTe2 (eta = 1.970%) and CuInSe2 (eta = 2.286%). The efficiency of the devices decreases as the Se increases.

• 出版日期2017-7-15