13668
This information is used to optimize the cell assembly process , yielding Cys - based cells that significantly outperform MPA cells , and reach power conversion efficiencies ( PCE ) as high as 2 . 7 % under AM 1 . 5 illumination .
 Chemical: Cys; Chemical: MPA
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: Cys; Chemical: MPA