Abstract: We briefly review some physical aspects of organic solids, which manifest the crosslinking of physics and chemistry. Form the theories of solitons, polarons and fractional charge to optoelectronics applications, of organic materials we find that there exists a strong interaction between physics and chemistry, which is mutually beneficial. This interdisciplinary crosslinking could also bring about controversy. However, scientific debates pose more and further questions to be answered, which is essential for the advancement of science.