For example , in CdSe quantum dots , Cd dangling orbitals act as electron traps while Se dangling orbitals act as hole traps .
If the energy of the dangling orbital band is within the semiconductor bandgap , electrons and holes can be trapped at the crystal surface .
In CdSe quantum dots , Cd dangling orbitals act as electron traps while Se dangling orbitals act as hole traps .
If the energy of the dangling orbital band is within the semiconductor bandgap , electrons and holes can be trapped at the crystal surface .