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A Novel DPP Based Polymer HTL for PbS CQD-SCs
천형진,김홍일,백세웅,류승언,이승진,최민재,최경원,Margherita Biondi,Sjoerd Hoogland,F. Pelayo Garcia de Arquer,권순기,박태호,Edward H. Sargent,김윤희 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
DPP-based polymers are widely used in organic photovoltaics (OPV) and organic field-effect transistors (OFET) as the p-type materials. DPP with bithiophene (π-bridge) has already been proven to have excellent charge transport properties owing to an attractive S···O electrostatic interaction that induces π–π stacking. Therefore, we were performed Stille coupling reaction to combine these D–A building blocks to form the desired HTL. PD2FCT-29DPP (D1–A1–D1–A2) is a D–A alternating copolymer from the DPP (A2) and CPDT (D1) with fluorinated BT (A1). PD2FCT-29DPP-based devices achieve an FF of 70.0% and a PCE of 14.0%.
Perovskite energy funnels for efficient light-emitting diodes
Yuan, Mingjian,Quan, Li Na,Comin, Riccardo,Walters, Grant,Sabatini, Randy,Voznyy, Oleksandr,Hoogland, Sjoerd,Zhao, Yongbiao,Beauregard, Eric M.,Kanjanaboos, Pongsakorn,Lu, Zhenghong,Kim, Dong Ha,Sarge Nature Publishing Group 2016 Nature nanotechnology Vol.11 No.10
<P>Organometal halide perovskites exhibit large bulk crystal domain sizes, rare traps, excellent mobilities and carriers that are free at room temperature-properties that support their excellent performance in charge-separating devices. In devices that rely on the forward injection of electrons and holes, such as light-emitting diodes (LEDs), excellent mobilities contribute to the efficient capture of non-equilibrium charge carriers by rare non-radiative centres. Moreover, the lack of bound excitons weakens the competition of desired radiative (over undesired non-radiative) recombination. Here we report a perovskite mixed material comprising a series of differently quantum-size-tuned grains that funnels photoexcitations to the lowest-bandgap light-emitter in the mixture. The materials function as charge carrier concentrators, ensuring that radiative recombination successfully outcompetes trapping and hence non-radiative recombination. We use the new material to build devices that exhibit an external quantum efficiency (EQE) of 8.8% and a radiance of 80 W sr(-1) m(-2). These represent the brightest and most efficient solution-processed near-infrared LEDs to date.</P>
High-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers
Kim, Gi-Hwan,Garcí,a de Arquer, F. Pelayo,Yoon, Yung Jin,Lan, Xinzheng,Liu, Mengxia,Voznyy, Oleksandr,Yang, Zhenyu,Fan, Fengjia,Ip, Alexander H.,Kanjanaboos, Pongsakorn,Hoogland, Sjoerd,Kim, Jin American Chemical Society 2015 NANO LETTERS Vol.15 No.11
High Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers
김기환,F. Pelayo Garcia de Arquer,윤영진,Xinzheng Lan,Mengxia Liu,Oleksandr Voznyy,Zhenyu Yang,Fengjia Fan,Alexander H. Ip,Pongsakorn Kanjanaboos,Sjoerd Hoogland,김진영,Edward H. Sargent 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.1