Conjugated oxazole-based interfacial materials for efficient and stable inverted polymer solar cell with an efficiency of 16.52%
Sankar Sekar
Department of Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, Republic of Korea
Search for more papers by this authorK. Ashok Kumar
Department of Chemistry, Anna University, Chennai, India
Search for more papers by this authorVijaya Gopalan Sree
Division of Physics and Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Search for more papers by this authorG. Gnanamoorthy
Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, India
Search for more papers by this authorCorresponding Author
Sejoon Lee
Department of Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, Republic of Korea
Correspondence
Ramalingam Manikandan and Sejoon Lee, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
Email: [email protected] and [email protected]
Search for more papers by this authorDeuk Young Kim
Department of Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, Republic of Korea
Search for more papers by this authorCorresponding Author
Ramalingam Manikandan
Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, India
Department of Analytical Chemistry, University of Madras, Chennai, India
Correspondence
Ramalingam Manikandan and Sejoon Lee, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
Email: [email protected] and [email protected]
Search for more papers by this authorSankar Sekar
Department of Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, Republic of Korea
Search for more papers by this authorK. Ashok Kumar
Department of Chemistry, Anna University, Chennai, India
Search for more papers by this authorVijaya Gopalan Sree
Division of Physics and Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Search for more papers by this authorG. Gnanamoorthy
Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, India
Search for more papers by this authorCorresponding Author
Sejoon Lee
Department of Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, Republic of Korea
Correspondence
Ramalingam Manikandan and Sejoon Lee, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
Email: [email protected] and [email protected]
Search for more papers by this authorDeuk Young Kim
Department of Semiconductor Science, Dongguk University-Seoul, Seoul, Republic of Korea
Quantum-functional Semiconductor Research Center, Dongguk University-Seoul, Seoul, Republic of Korea
Search for more papers by this authorCorresponding Author
Ramalingam Manikandan
Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai, India
Department of Analytical Chemistry, University of Madras, Chennai, India
Correspondence
Ramalingam Manikandan and Sejoon Lee, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
Email: [email protected] and [email protected]
Search for more papers by this authorFunding information: National Research Foundation of Korea, Grant/Award Numbers: 2016R1A6A1A03012877, 2019R1A2C1085448
Summary
Organic solar cells (OSCs) using non-fullerene acceptors have delivered the highest efficiencies in the overall reported literatures. In order to improve the efficiency and stability of OSCs, great efforts are being made in designing and synthesizing new materials. Inverted OSCs were fabricated using three commercially available and inexpensive materials, 5-methylbenzoxazole (E1), 2-(4-biphenyl)-5-phenyloxazole (E2), and 4-bis(5-phenyl-2-oxazolyl)benzene (E3), as an interlayer between zinc oxide and the active layer. The new interlayer materials enhance the carrier injection/extraction properties and thus, the polymer solar cells (PSCs) exhibited an improved JSC and power conversion efficiency (PCE). PSCs showed an improved JSC of 27.18 from 24.88 mA/cm2 with the introduction of E3. The new interlayer, E3 in particular, forms well-aligned cascading energy levels between the PM6:Y6 active layer and zinc oxide layer. These cascading energy levels reduce the energy barrier for electron injection and collection at the interface. Thus, the PCE of devices reached a remarkable 16.52% using interlayer at the ZnO/active layer interface. The devices also exhibited improved device stability under continuous illumination, annealing, and high humidity.
CONFLICT OF INTEREST
The authors declare that they have no competing interests.
Supporting Information
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