19161
Low temperature solution - processed high performance photodiode based on Si - ZnO core - shell structure .
 Chemical: Si; Chemical: ZnO
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Si, ZnO 
Answer:
 Chemical: Si; Chemical: ZnO