The University of Tokyo · Engineering
Yanbo Wang 교수의 연구실은 고효율·고안정성 페로브스카이트 태양전지의 개발을 핵심 목표로 하며, 전도성 고분자 및 2차원 나노재료를 활용한 전하 수송층 최적화, 페로브스카이트 결정성 및 표면 안정성 향상 전략을 연구하고 있습니다. 특히, 해리화된 페로브스카이트의 분해를 억제하고 전하 수확 효율을 높이기 위한 이종구조 설계와 화학적 결합 제어 기법을 중심으로 혁신적인 소재 및 공정 기술을 개발하고 있습니다. 이는 페로브스카이트 태양전지의 상용화를 위한 핵심 과제인 내구성과 재현성 문제 해결에 기여하고 있습니다.
Figures are computed from collected data and may differ slightly.
Here we report a solution-processing strategy to stabilize the perovskite-based heterostructure. Strong Pb-Cl and Pb-O bonds formed between a [CH(NH<sub>2</sub>)<sub>2</sub>] <i><sub>x</sub></i> [CH<sub>3</sub>NH<sub>3</sub>]<sub>1-</sub> <i><sub>x</sub></i> Pb<sub>1+</sub> <i><sub>y</sub></i> I<sub>3</sub> film with a Pb-rich surface and a chlorinated graphene oxide layer. The constructed heterostructure can selectively extract photogenerated charge carriers and impede the loss of decomposed co
A comprehensive review on the efficiency progress of inverted perovskite solar cells towards future development and commercialization.
We report a templated growth of FASnI<sub>3</sub> crystals by reconstruction of the intermediate phase, and an efficiency of 11.22% was certified.
Abstract Three acceptor–donor–acceptor type nonfullerene acceptors (NFAs), namely, F–F, F–Cl, and F–Br, are designed and synthesized through a halogenation strategy on one successful nonfullerene acceptor FDICTF (F–H). The three molecules show red‐shifted absorptions, increased crystallinities, and higher charge mobilities compared with the F–H. After blending with donor polymer PBDB‐T, the F–F‐, F–Cl‐, and F–Br‐based devices exhibit power conversion efficiencies (PCEs) of 10.85%, 11.47%, and 12
Abstract Perovskite solar cells (PSCs) have advanced quickly with their power conversion efficiency approaching the record of silicon solar cells. However, there is still a big challenge to obtain both high efficiency and long‐term stability for future commercialization of PSCs. The major instability issue is associated with the decomposition or phase transition of perovskite materials that are believed to be intrinsically unstable under outdoor working conditions. Herein, the authors review the
Perovskite solar cells (PSCs) have undergone an incredibly fast development and attracted intense attention worldwide owing to their high efficiency and low-cost fabrication. However, it is challenging to make a reliable measurement of PSCs, which creates great difficulty for researchers to compare and reproduce published results. Herein, the major measurement methods and key factors affecting evaluation of PSCs are summarized, such as hysteresis in current-voltage measurement, calibration of so
Abstract The inverted perovskite solar cell has made great progress in recent years and the quality of the heterojunction has played a key role. Here, a series of halide‐substituted benzoic acid molecules are investigated as the bridge between nickel oxide and the perovskite, constructing a stable and efficient buried heterojunction via halogen bonding. The designed molecules are anchored at the surface of NiO by the coordination between the carboxyl and hydroxyl groups. On the opposite site of
Abstract Tin halide perovskites are promising candidates for preparing efficient lead‐free perovskite solar cells due to their ideal band gap and high charge‐carrier mobility. However, the notorious rapid crystallization process results in the inferior power conversion efficiency (PCE) of tin perovskite solar cells (TPSCs). Here, a facile method is employed to manage this crystallization process by using cold precursor solution that raises the critical Gibbs free energy to slow down the nucleati
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