Abstract

We report a new (to the best of our knowledge) transparent conductive oxide (TCO) layer with a monolayer of closed-pack Al-doped ZnO (AZO) spheres partly embedded in an AZO thin film. The average transmittance and haze ratio in the wavelength range of 380800nm achieves 65% and 55%, respectively, when AZO spheres with a diameter of 500nm are embedded in a thickness of 240nm AZO thin films. The a-Si thin-film solar cell with a regular p-i-n TCO structure is demonstrated. Under air mass 1.5 global illumination, conversion efficiencies of 5.6%, a fill factor of 0.55, Voc of 0.81V, and a Jsc of 2.44mA/cm2 are obtained. The Letter helps us to open up potential applications of a new TCO in advanced solar cells and light-emitting diodes.

© 2011 Optical Society of America

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