Semiconducting boron carbides with better charge extraction through the addition of pyridine moieties
作者： Elena Echeverria , Bin Dong , George Peterson , Joseph P Silva , Ethiyal R Wilson
DOI: 10.1088/0022-3727/49/35/355302
关键词: Boron carbide 、 Band gap 、 Pyridine 、 Carrier lifetime 、 Plasma-enhanced chemical vapor deposition 、 Photoluminescence 、 Analytical chemistry 、 Exciton 、 Organic chemistry 、 Charge carrier 、 Materials science
摘要: The plasma-enhanced chemical vapor (PECVD) co-deposition of pyridine and 1,2 dicarbadodecaborane, 1,2-B10C2H12 (orthocarborane) results in semiconducting boron carbide composite films with a significantly better charge extraction than deposited synthesized from orthocarborane alone. PECVD pyridine/orthocarborane based composites, ratios ~3:1 or 9:1 exhibit indirect band gaps 1.8 eV 1.6 eV, respectively. These energies are less the corresponding exciton 2.0 eV–2.1 eV. capacitance/voltage current/voltage measurements indicate hole carrier lifetimes for composites (3:1) ~350 µs compared to values ≤35 fabricated without pyridine. lifetime longer initial decay times region ~0.05 ns 0.27 pyridine, respectively, as suggested by time-resolved photoluminescence. data enhanced electron–hole separation consistent zero bias neutron voltaic indicating collection efficiency.
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