14047
Additionally , optical measurements reveal a direct bandgap of about 2 eV , which is larger than our calculated bandgap of 1 . 42 eV due to the Burstein - Moss effect .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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