title: An energy-harvesting scheme employing CuGaSe2 quantum dot-modified ZnO buffer layers for drastic conversion efficiency enhancement in inorganic-organic hybrid solar cells.
abstract: We demonstrated a promising route to enhance the performance of inverted organic photovoltaic (OPV) devices by the incorporation of CuGaSe2 (CGS) quantum dots (QDs) into the ZnO buffer layer of P3HT:PCBM-based devices. The modification of QDs provides better band alignment between the organic/cathode interface, improves ZnO crystal quality, and increases photon absorption, leading to more effective carrier transport/collection. By employing this energy-harvesting scheme, short-circuit current density, open-circuit voltage, and fill factor of the OPV device after CGS QD modification are improved by 9.43%, 7.02% and 6.31%, respectively, giving rise to a 23.8% enhancement in the power conversion efficiency.
authors: Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan.
authors: Cherng-Rong
authors: CR
authors: Ho
authors: Meng-Lin
authors: ML
authors: Tsai
authors: Hung-Jun
authors: HJ
authors: Jhuo
authors: Der-Hsien
authors: DH
authors: Lien
authors: Chin-An
authors: CA
authors: Lin
authors: Shin-Hung
authors: SH
authors: Tsai
authors: Tzu-Chiao
authors: TC
authors: Wei
authors: Kun-Ping
authors: KP
authors: Huang
authors: Show-An
authors: SA
authors: Chen
authors: Jr-Hau
authors: JH
authors: He
mesh_terms: D003300:Copper / Q000737:chemistry*; D011211:Electric Power Supplies; D004566:Electrodes; D032061:Galium / Q000737:chemistry*; D005708:Gallium / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D045663:Quantum Dots; D011789:Quantum Theory; D012643:Selenium / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*; D012993:Solar Energy; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D011108:Polymers; D018036:Selenium Compounds; C101792:copper gallium diselenide; D003300:Copper; D005708:Gallium; D012643:Selenium; D015034:Zinc Oxide