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SCT905,, ext. 7038


The web link provides additional details for this project:


Indoor photovoltaic cells (3/6 units)

Small, portable electronic devices are currently used at indoor environments. Most of these devices are powered by small batteries which are disposed when they are drained. Thus, there is a clear need to create sustainable batteries for these devices. Few people, however, pay attention to photovoltaic (PV) devices because they are developed for outdoor application. The rise of organic photovoltaic (OPV) cells provides an interesting alternative. Organic materials possess strong absorbances in the visible light region ~390-760nm, and so OPV cells are better light harvestors than silicon-based PV devices under room light illumination. This realization spearheads the emergent study of OPV devices under different illumination conditions. In this project, we aim at constructing and characterizing OPV devices for operation indoors. The keys for accomplishing the target are (1) the choice of light absorbers that can retain large open-circuit voltages and fill-factors, and (2) means to improve charge transport of PV cells. Students will learn different experimental and engineering skills, including sample fabrication, optical and electrical characterization, and some device modeling.

This project can take 1-2 students.


Designing a Ternary Photovoltaic Cell for Indoor Light Harvesting with a Power Conversion Efficiency Exceeding 20%, H. Yin, J.K.W. Ho, S.H. Cheung, R.J. Yan, K.L. Chiu, X.T. Hao and S.K. So, J. Mater. Chem. A, 6, 8579 (2018).