In this work, the effect of Mg doping on the performance of PbS quantum dot (QD) solar cells (QDSCs) is investigated. To elucidate that, PbS QDSCs with pristine ZnO and Mg-doped ZnO (ZMO) as electron transporting layers (ETLs) are fabricated, respectively. The current density-voltage (J-V) measurements are performed. The results show that the cell efficiency of the device with ZMO as an ETL is 9.46%

The structure of 3d5 configuration ion in a trigonal field is theoretically determined on the basis of a 252×252 matrix of complete energy. The spectra of paramagnetic electron resonance and the optical absorption of the Fe3+ ion in sapphire crystal (α−Al2O3) have been calculated by diagonalizing the matrix of total energy. The obtained results are in good agreement with experimental observations.

A high-speed residue-free transfer method using PDMS (polydimethylsiloxane) stamp and water infiltration between graphene and a hydrophilic surface is reported. Monolayer graphene was transferred from an enhanced fluorinated Al2O3 surface using PDMS. Water infiltration dramatically reduced the time required to separate the graphene from the Al2O3 substrate to a few minutes. The graphene was then successfully