1992
DOI: 10.1002/pssb.2221690223
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Energy‐Dependent Excitonic Injection of Charge into Anthracene Crystals

Abstract: Steady-state exciton-injection currents (EIC) as a function of electric field and temperature are measured in anthracene crystals upon energy-selective excitation within the So + S, transition. The current for each given absorption coefficient decreases as the excitation energy (ho) passes through the high-energy wing and is swept downward the low-energy wing (Urbach tail) of the absorption band, demonstrating that the flux of excitons reaching the injecting contact is energy dependent. The maximum absorption … Show more

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“…E ex and E g denote exciton energy and band gap energy in organic material, respectively. Hole injection into organic material is possible by tunneling of an electron from distance x [31,32]. After electron tunneling to free states in metal electrode or to some acceptors in nonmetallic electrode (eq.…”
Section: Injection By Optical Excitation Of the Organic Materialsmentioning
confidence: 99%
“…E ex and E g denote exciton energy and band gap energy in organic material, respectively. Hole injection into organic material is possible by tunneling of an electron from distance x [31,32]. After electron tunneling to free states in metal electrode or to some acceptors in nonmetallic electrode (eq.…”
Section: Injection By Optical Excitation Of the Organic Materialsmentioning
confidence: 99%