The GAs have the same population size, selection method, and mutation rate as previous GAs. Each individual is represented as a donor and acceptor index, where the possible materials are the top 1,000 acceptors and top 1,000 donors from GAs 1-4. Crossover takes an acceptor from one parent and the donor from another. Mutation allows replacement of a new acceptor or donor. When new D/A combinations were created, the donor's HOMO and LUMO were required to be higher than the acceptor's HOMO and LUMO. The GA ran for 500 generations to ensure convergence.