that covers modern developments in Organic Photovoltaics (OPV) and OLEDs.
Highly localized on a single molecule or localized polymer segment. They feature a tiny radius and a very high exciton binding energy ( Ebcap E sub b
: Free polarons travel through percolation pathways to their respective electrodes to generate electrical current. Organic Field-Effect Transistors (OFETs) physics of organic semiconductors pdf
Many universities host PDFs of advanced courses. Use Google Scholar with the phrase filetype:pdf "physics of organic semiconductors" lecture notes . Notable institutions with open courseware include:
The energy offset between the LUMO levels drives electron transfer from the donor to the acceptor, overcoming the exciton binding energy. In inorganic crystals (like Si), charge carriers move
In inorganic crystals (like Si), charge carriers move freely in extended Bloch states. In organics, the molecules retain their individual identity. Electrons do not move freely through a sea of atoms; they hop from one localized molecular orbital to the next. This "hopping transport" is the cornerstone of organic semiconductor physics.
Require the dissociation of excitons at a donor-acceptor interface to generate free charges. In inorganic crystals (like Si)
μ(T)=μ0exp[−(T0T)n]mu open paren cap T close paren equals mu sub 0 exp open bracket negative open paren the fraction with numerator cap T sub 0 and denominator cap T end-fraction close paren to the n-th power close bracket