The influence of sintering temperatures on solution-processed cadmium telluride (CdTe) nanocrystal films is studied in order to maximize the performance of CdTe/Al Schottky nanocrystal solar cells. The best overall performance of 2.67% efficiency at air mass 1.5 was achieved from devices with CdTe films sintered at 350 °C X-ray diffraction, scanning electron microscopy and UV-vis absorption measurements show that the CdTe nanocrystal grains began to grow remarkably well when sintering temperatures increased to 350 °C. By analyzing the current—voltage characteristics, we find that the short-circuit current densities of devices increase with sintering temperatures ranging from 200 to 400 °C, but, the over-sintered (450 °C) treatment induces the shunting of devices.
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Xu et al. (2012) studied this question.
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