Design, synthesis and characterization of 1,8-naphthalimide based fullerene derivative as electron transport material for inverted perovskite solar cells

Autor(es)

Sivakumar, Gangala ^[1] ; Bertoni, Alden Hermsdorff ^[1] ; Kim, Hui-Seon ^[2] ; Marchezi, Paulo Ernesto ^[1] ; Bernardo, Douglas Rosa ^[1] ; Hagfeldt, Anders ^[2] ; Graetzel, Michael ^{[2, 3]} ; Zakeeruddin, Shaik M. ^[3] ; Nogueira, Ana Flavia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, LNES, Chem Inst, UNICAMP, POB 6154, BR-13083970 Campinas, SP - Brazil

^[2] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, Sch Basic Sci, CH-1015 Lausanne - Switzerland

^[3] Ecole Polytech Fed Lausanne, Lab Photomol Sci, Inst Chem Sci & Engn, Sch Basic Sci, CH-1015 Lausanne - Switzerland

• Tipo de documento: Artigo Científico
• Fonte: Synthetic Metals; v. 249, p. 25-30, MAR 2019.
• Citações Web of Science: 1

Resumo

A new fullerene derivative, PC61BNI, was designed and synthesized in which {[}6,6]-phenyl C-61-butyric acid methyl ester (PC61BM) was modified by replacing the methyl group with 1,8-naphthalimide (NI) to investigate the molecular structure modification effect on perovskite solar cell performance. Inverted perovskite solar cells were fabricated employing PC61BNI as an electron transport material (ETM) and its performance was compared with that of the device fabricated using PC61BM. Optical and electrochemical properties of the PC61BNI were characterized, and how NI substitution affects the solar cells performance was investigated. The photoluminescence quenching experiments confirmed efficient electron injection from perovskite film into PC61BNI layer. The lowest unoccupied molecular orbital (LUMO) energy level of PC61BNI (-3.75 eV) was found to be higher than that of PC61BM (-3.91 eV). The device fabricated with PC61BNI exhibited a power conversion efficiency (PCE) of 10.79% with photocurrent density (Jsc) of 20.23 mA/cm(2), open-circuit voltage (Voc) of 1.078 V and fill factor (FF) of 0.497. (AU)

• Processo FAPESP: 14/13667-6 - Non-Fullerene, Small Molecular Acceptors for Organic Photovoltaics
• Beneficiário: Sivakumar Gangala
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado