Transcript Document 7898814

Ge Quantum Dots (QD) Nanocomposites,
S. Ismat Shah (PI) DMR-0441619
Using a very simple
Fig. 1. The New Solar
Cell Concept.
vacuum deposition
Fig. 2. Micrographs of
process, we prepared GeGe Quantum dots in
TiO2 nanocomposites. By
TiO2 matrix.
changing the Ge QD size
all wavelengths, from IR to
UV can be absorbed. This
is useful for Solar Cell
applications. Figure 1
shows the concept of Ge
quantum dots based solar
cells.
Figures 2 shows the high resolution transmission electron
micrographs showing the Ge quantum dots surrounded by TiO2
matrix. Preliminary photoconductivity experiments show a factor of
4 increase in photoconductivity upon exposure to white light.
Getting Involved
S. Ismat Shah (PI) DMR-0441619

One high school
student, two
undergraduate
students, and one
graduate student have
been involved in
nano-TiO2 research
that includes research
on Ge-TiO2 quantum
dots nanocomposites.