14470
In the early stages , the efficiency of DSCs with arylamine organic dyes with D - pi - A character was far behind that of DSCs with ruthenium ( II ) complexes partly due to the lack of information about the relationship between the chemical structures and the photovoltaic performance .
 Chemical: arylamine; Chemical: ruthenium ( II )
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: arylamine; Chemical: ruthenium ( II )