29208
This provides an atomic insight of interfacial band alignments between the two opposite electrodes , which will be crucial for improving the efficiencies of the charge generation , transport , and collection and the corresponding device performance of polymer solar cells .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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