Aidan’s paper entitled “Controlling Crystallization of Quasi-2D Perovskite Solar Cells: Incorporating Bulky Conjugated Ligands” has been published in Advanced Energy Materials. Congratulations!
A bulky bi-thiophene 2T ligand is used to create vertically-aligned quasi-2D perovskite films. By starting with a poorly coordinating solvent (GBL) and adding a small amount of DMSO and methanol, it is found that vertical orientation and z-uniformity is greatly improved. These are examined using grazing-incidence wide-angle X-ray scattering and advanced optical characterizations. Solar cells with an max efficiency of 13.3% are demonstrated. The quasi-2D absorbing layers show excellent stability in moisture, remaining unchanged after hundreds of hours. Read the story here.