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The rise of photo - active graphene in photonics and optoelectronics is evidenced by a spate of recent reports on topics ranging from photodetectors , photovoltaics , and optoelectronics to photocatalysis .
 Chemical: graphene
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: graphene