Photoexcited carrier dynamics in colloidal quantum dot solar cells: insights into individual quantum dots, quantum dot solid films and devices

Abstract

Topics of photoexcited carrier dynamics in quantum dot solar cells are reviewed and discussed for the first time.

Anthradithiophene based hole-transport material for efficient and stable perovskite solar cells

“…The Nyquist plot fitting results of BTPA-7 based PSC device exhttps://engine.scichina.com/doi/10.1016/j.jechem.2020.02.021 hibit both a larger R s (30 ) and a lower R rec (220 ), which may arise from the lower conductivity of the BTPA-7 layer. These results corroborate the lower FF and V oc values of BTPA-7 based PSC as shown in the J-V curves compared with the spiro-OMeTAD reference PSC device [46] . Stability is the challenge for the PSC commercialization [47 , 48] .…”

Ligand-Length Modification in CsPbBr3 Perovskite Nanocrystals and Bilayers with PbS Quantum Dots for Improved Photodetection Performance

“…Similarly, Yang et al [ 38 ] studied a similar photodevice as a photodetector reporting V oc = 1.2–1.3 V and J sc of 1–4 mA cm −2 . It should be noted that the MPA ligand may result in a different electronic work function, as demonstrated for PbS QD solids, in which the work function can vary several hundreds of meVs depending on the ligand post-treatment applied [ 17 , 39 ].…”

Recent advances in metal halide perovskite photocatalysts: Properties, synthesis and applications

“…Therefore, more efforts are still needed to design and prepare different types of MHP photocatalysts to fully explore their potentials in photocatalysis. The proposed directions for future research on MHP-based photocatalysts are: (i) Utilization of MHPs with different morphologies [91], such as QDs, nanorod, and 2D nanosheet to facilitate the charge separation and mass transport; (ii) rational design of MHP-based composites to achieve stronger light absorption and promote charge separation; (iii) precise control of charge carriers in MHPs with the aid of modern characterization methods, such as transient absorption and time-resolved terahertz spectroscopy [195]; (iv) preparation of stable and eco-friendly highperformance MHP-based photocatalysts; (v) investigation of mechanisms by combining theoretical calculations and in-situ characterization techniques to probe the reaction pathways and reveal the changes of catalysts during photocatalysis [196]. These challenges also signify great opportunities for further improving photocatalytic activity and exploring more potential reactions in MHPs.…”