Photo and bias effects in coplanar conductance of doping-modulated amorphous silicon superlattices

Suk Ho Choi, Byueng Su Yoo, Choochon Lee, Jin Jang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The effects of high temperature annealing on persistent photoconductivity (PPC) and of bias on the coplanar conductance in doping-modulated super-lattices and compensated films of hydrogenated amorphous silicon (a-Si : H) have been investigated. All the multilayers showing PPC have nonlinear current-voltage characteristics, which are not observed in single-layered a-Si : H, even in compensated films showing a large PPC. At low bias voltage (E ≤ 10 V/cm) the coplanar conductance is constant with time. At higher field the conductance decays slowly until it reaches a saturation value. The bias effect as well as the PPC is drastically reduced after annealing at 300 °C for 30 min. Experimental results can be explained by assuming H complex centers in the region with excess hydrogen at the n-p interfaces.

Original languageEnglish
Pages (from-to)911-914
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume97-98
Issue numberPART 2
DOIs
Publication statusPublished - 2 Dec 1987

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