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Updated: Jan 21, 2026
11:14
Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
Published on: May 28, 2016
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Electronically Controlled Chemical Stability of Compound Semiconductor Surfaces.
Junning Gao1,2, Yeonbae Lee2, Kin Man Yu3
1School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China.
ACS Applied Materials & Interfaces
|August 14, 2019
Summary
Semiconductor stability in humid conditions depends on surface charge. Optimizing surface charge by doping or material choice can prevent degradation from humidity, crucial for electronic device longevity.
Area of Science:
- Materials Science
- Surface Chemistry
- Semiconductor Physics
Background:
- Semiconductor degradation in humid environments is a critical issue for device reliability.
- Surface charge plays a significant role in the stability of semiconductor materials.
- Understanding these interactions is vital for developing durable electronic components.
Purpose of the Study:
- To investigate the impact of a humid environment on semiconductor degradation.
- To elucidate the role of surface charge in material stability.
- To explore strategies for enhancing semiconductor resilience to moisture.
Main Methods:
- Exposure of cadmium oxide (CdO) and tin telluride (SnTe) films to 85 °C and 85% relative humidity.
- Electrical property measurements before and after environmental exposure.
- Analysis of surface charge effects on semiconductor stability.
Main Results:
- Undoped CdO with a positively charged surface showed significant instability.
- Doping CdO to create a negatively charged surface greatly improved stability.
- Undoped p-type SnTe with a negatively charged surface also exhibited superior stability.
- Reactivity was attributed to the attraction of hydroxyl (OH-) or hydrogen (H+) ions.
Conclusions:
- Semiconductor stability in humid environments is controllable via surface charge.
- Surface charge dictates the interaction with environmental ions like OH- and H+.
- These findings offer insights into protecting semiconductor surfaces in aqueous or ionic solutions.
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