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Low temperature fabrication of APCVD a-Si thin film transistors with ion doped layer

  • Kyung Ha Lee
  • , Jae Ho Yoo
  • , Byeong Yeon Moon
  • , Jae Hoon Jung
  • , Jin Jang
  • , S. M. Pietruszko
  • , Min Koo Han
  • , Hyuk Ryeol Park

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The effect of substrate temperature on the electrical and optical properties of AP (atmospheric pressure) chemical vapor deposited (CVD) a-Si films to fabricate low substrate temperature CVD a-Si TFT was investigated. The photosensitivity and hydrogen content of APCVD a-Si film deposited at 380°C are 1.35 × 105 and 3.08 at.%, respectively. This film exhibited an Urbach energy of 53 meV and defect density of 5 × 1015 cm-3. The conductivity and conductivity activation energy for an ion doped a-Si layer with an ion dose of 2.7 × 1014 cm-2 are 4.6 × 10-3 S cm-1 and 0.11 eV, respectively. The fabricated APCVD a-Si TFT using a-Si film deposited at 380°C exhibited the field effect mobility of 1 cm2 V s-1 and threshold voltage of 7.5 V.

Original languageEnglish
Pages (from-to)1141-1145
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume198-200
Issue numberPART 2
DOIs
Publication statusPublished - May 1996

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation through the Semiconductor Physics Research Center, and by the Basic Science Research Institute Program, Ministry of Education, project no. BSRI-'95-2443.

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