Colloidal semiconductor nanocrystals (NCs) are promising optoelectronic materials due to their size-tunable properties and low-cost solution-processing fabrication. Our goal is to construct a distributed NC heterojunction for inclusion in a solar cell.
Methods and challenges:
Fabricating a NC heterojunction requires a combination of solution phase synthesis of the NC and thin film techniques for depositing the surrounding matrix. Ideally, both the NC and the thin film would be highly pure, well-ordered crystalline semiconductors.
The assembly challenges include removal or replacement of the capping ligand, and filling or crystallization of the interstitial regions.