14198
It is suggested that the open circuit photovoltage is dominated by the number of pn junctions in a multiple - junction photoelectrode and the carrier transfer inside the photoelectrode is improved by narrowing the single - layer thickness .
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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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