Today, materials science and technology development is fundamentally complex. Various compounds based on chemical elements, diluted and containing doping materials, isotopically modified substances, biopolymers, etc. demonstrat novel properties different from their elementary and chemically pure materials. The preparation and regulation of these new material properties requires multi-disciplinary science and technology and constitutes a complex system. The most ubiquitous of these new materials are those being used and developed in the field of semiconductors. Complexity in semiconductor physics is manifested by several new phenomena related to quantization effects and has given rise to new solid state electronics – nano-electronics and spintronics.