Assertion: solar panel's cell | /r/HasProperty | fabricated in combination
Facets:
value: as an electron donor
type: MANNER
value: with ptb7
type: OTHER
Source sentences:
text: In 2014, near-infrared polymer solar cells based on a copolymer of naphthodithiophene diimide and bithiophene (PNDTI-BT-DT) were fabricated in combination with PTB7 as an electron donor.