Effect of Thermally Induced Transitions on Electronic Transport in Aliphatic Polysilylenes

摘要: Electronic transport of photoinjected holes in high molecular weight linear polymers with silicon and germanium backbone displays a familiar pattern electric field temperature dependence similar to behavior already reported very diverse collection glassy solids. At fixed fields, during both rate step heating, the mobility activation energy e all these changes abruptly reversibly at Tc, which is specific for each polymer, without concurrent abrupt mobilities. These temperatures coincide respective glass transition Tg. In cases, below-Tg higher than above aliphatic side groups, e(t > t g) extremely low, practically approaching zero. The change near Tg that observed amorphous charge-transporting other glasses including selenium its alloys. Polymers such as poly(di-n-hexylsilylene) (PDHS) undergo conformational transitions TTr due chain crystallization melting, also experience TTr. association bathochromic shift uv spectra demonstrated.