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Reduced Energy Offsets and Low Energy Losses Lead to Efficient (∼10% at 1 sun) Ternary Organic Solar Cells AITranslate

Maria Privado; Cristina Rodríguez Seco; Rahul Singhal; Pilar de la Cruz; Fernando Langa; Ganesh D. Sharma; Emilio Palomares;
Universidad de Castilla La Mancha; The Barcelona Institute of Science and Technology (ICIQ-BIST); Malviya National Institute of Technology;Universidad de Castilla La Mancha;Universidad de Castilla La Mancha; The LMN Institute of Information Technology; The Barcelona Institute of Science and Technology (ICIQ-BIST)
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Publisher: ACS
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Abstract AITranslate

Two organic semiconductor molecules, CS01 and MPU3, an electron donor and electron acceptor, respectively, are described for use in organic bulk heterojunction solar cells. The highest occupied molecular orbital (HOMO) energy offset (ΔΕHOMO) between these two molecules is as low as 0.29 eV. Moreover, the lowest unoccupied molecular orbital (LUMO) energy offset (ΔΕLUMO) is as low as 0.14 eV. Nonetheless, the interfacial charge-transfer process upon light excitation is extremely efficient, and solar cells with efficiencies, under normal conditions, as high as 7.81% have been fabricated. Furthermore, the incorporation of PC71BM (another electron acceptor molecule) to fabricate a triple organic heterojunction led to efficiencies close to 10% at 1 sun irradiation conditions. The improvement is due to a better panchromatic harvesting of the sunlight and a better charge balance, which allows the rapid extraction of carriers before they can recombine.

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DOI：https://doi.org/10.1021/acsenergylett.8b01400

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Citation Information:

Two organic semiconductor molecules, CS01 and MPU3, an electron donor and electron acceptor, respectively, are described for use in organic bulk heterojunction solar cells. The highest occupied molecular orbital (HOMO) energy offset (ΔΕHOMO) between these two molecules is as low as 0.29 eV. Moreover, the lowest unoccupied molecular orbital (LUMO) energy offset (ΔΕLUMO) is as low as 0.14 eV. Nonetheless, the interfacial charge-transfer process upon light excitation is extremely efficient, and solar cells with efficiencies, under normal conditions, as high as 7.81% have been fabricated. Furthermore, the incorporation of PC71BM (another electron acceptor molecule) to fabricate a triple organic heterojunction led to efficiencies close to 10% at 1 sun irradiation conditions. The improvement is due to a better panchromatic harvesting of the sunlight and a better charge balance, which allows the rapid extraction of carriers before they can recombine.

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GB/T 7714-2015 [1] Maria Privado, Cristina Rodríguez Seco, Rahul Singhal, et al. ACS Energy Letters, 2018(3). DOI:10.1021/acsenergylett.8b01400.
MLA [1] Maria Privado, et al., ACS Energy Letters, no. 3, 2018, https://doi.org/10.1021/acsenergylett.8b01400.
APA [1] Maria Privado, Cristina Rodríguez Seco, Rahul Singhal, Pilar de la Cruz, Fernando Langa, Ganesh D. Sharma, & Emilio Palomares. (2018). ACS Energy Letters(3). https://doi.org/10.1021/acsenergylett.8b01400
IEEE [1] Maria Privado, Cristina Rodríguez Seco, Rahul Singhal, Pilar de la Cruz, Fernando Langa, Ganesh D. Sharma, and Emilio Palomares, ACS Energy Letters, no. 3, 2018, doi: 10.1021/acsenergylett.8b01400.