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Temperature dependence of transport properties of spiro - MeOTAD as a hole transport material in solid - state dye - sensitized solar cells .
 Chemical: spiro - MeOTAD
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: spiro - MeOTAD