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Here , we report a new highly efficient DSSC using perovskite BaSnO 3 ( BSO ) nanoparticles .
 perovskite, BaSnO 3, BSO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 perovskite, BaSnO 3, BSO