scispace - formally typeset
Search or ask a question
Author

Chia-Feng Li

Bio: Chia-Feng Li is an academic researcher from Ming Chi University of Technology. The author has contributed to research in topics: Perovskite (structure) & Perovskite solar cell. The author has an hindex of 4, co-authored 7 publications receiving 76 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: The findings in this work resolve the issues of scalability and solvent toxicity thus the mass production of perovskite solar cells becomes feasible.
Abstract: Low-cost and solution-processed perovskite solar cells have shown great potential for scaling-up mass production. In comparison with the spin coating process for fabricating devices with small areas, the blade coating process is a facile technique for preparing uniform films with large areas. High-efficiency perovskite solar cells have been reported using blade coating, but they were fabricated using the toxic solvent N,N-dimethylformide (DMF) in nitrogen. In this work, we present highly efficient blade-coated perovskite solar cells prepared using a green solvent mixture of γ-butyrolactone (GBL) and dimethyl sulfoxide (DMSO) in an ambient environment. By carefully controlling the interface, morphology, and crystallinity of perovskite films through composition variations and additives, a high power conversion efficiency of 17.02% is achieved in air with 42.4% reduction of standard deviation in performance. The findings in this work resolve the issues of scalability and solvent toxicity; thus, the mass production of perovskite solar cells becomes feasible.

38 citations

Journal ArticleDOI
TL;DR: In this article, a planar inverted structured perovskite solar cell (PSC) was fabricated in an ambient condition with a PCE of 12.4% as compared to that (13.3%) of PSC fabricated in glove box filled with nitrogen.

32 citations

Journal ArticleDOI
TL;DR: A facile synthesis of novel organic molecule capped metal oxide nanoparticles film for the composite ETL, which not only has dual function of electron transport and protection but also exhibit work function tunability, provides corner stone for large scale manufacture of high performance and stable PVSCs.
Abstract: The composite electron transporting layer (ETL) of metal oxide with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) prevents perovskite from metal electrode erosion and increases p-i-n perovskite...

18 citations

Journal ArticleDOI
TL;DR: In this article, the effect of a ZnO layer in between ITO and the active layer of PTB7:PC71BM-based polymer solar cells on the device performance under 1 sun and indoor light conditions was investigated.
Abstract: In this work, we have investigated in depth the effect of a ZnO layer in between ITO and the active layer of PTB7:PC71BM-based polymer solar cells on the device performance under 1 sun and indoor light conditions. Under 1 sun illumination, the PSCs with ZnO nanoparticles show the highest efficiency of 8.33%, which is nearly 14% more compared to the efficiency of the PSCs with ZnO prepared by the sol–gel method due to the shifting of open-circuit voltage (Voc). The PSCs with ZnO nanoparticles show better carrier transport, collection efficiency, reduced bi-molecular recombination, trap-assisted recombination, and charge accumulation as evident from the measurements of light intensity-dependent short circuit current density, Voc, and bulk capacitance of the device. The chemical capacitance extracted from impedance measurements and the trap depth can thoroughly explain the difference in Voc, i.e. the shift of energy level and carrier recombination are strongly dependent on the preparation methods of ZnO. Moreover, all the devices show similar performance under indoor light except the PSCs with ZnO prepared by the sol–gel method. The ZnO prepared by the sol–gel method could induce the trap-assisted recombination affecting Voc of the device and resulting in the decrease of its indoor performance. However, we believe that these results might provide a good pathway for the development of polymer solar cells for applications under sunlight and indoor light conditions.

11 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this paper, a review of perovskite-based solar cells is presented, focusing on the recent progress in morphology optimizations by various processing conditions such as annealing condition, additive effects, Lewis acid base adduct approach, precursor solution aging and post-device ligand treatment emphasizing on grain sizes, film uniformity, defect passivation, ambient compatibility and device efficiency and stability.
Abstract: Hybrid organic–inorganic halide perovskite based solar cell technology has passed through a phase of unprecedented growth in the efficiency scale from 3.8% to above 25% within a decade. This technology has drawn tremendous research interest because of facile solution processability, ease of large scale manufacturing and ultra-low cost production of perovskite based thin film solar cells. It has been observed that performances of perovskite-based solar cells are extremely dependent on the morphology and crystallinity of the perovskite layer. The high-quality perovskite films have made a significant impact on the fabrication of efficient and stable hybrid perovskite solar cells. It has also been observed that device lifetime depends on the perovskite morphology; devices with larger perovskite grains degrade slowly than those of the smaller ones. Various methods of perovskite growth such as sequential deposition, doctor blading, slot die coating and spray coating have been applied to achieve the most appropriate morphology necessary for highly efficient and stable solar cells. This review focuses on the recent progress in morphology optimizations by various processing condition such as annealing condition, additive effects, Lewis acid–base adduct approach, precursor solution aging and post-device ligand treatment emphasizing on grain sizes, film uniformity, defect passivation, ambient compatibility and device efficiency and stability. In this review, we also discussed recently developed bifacial stamping technique and deposition methods for large-area and roll-to-roll fabrication of highly efficient and stable perovskite solar cells.

128 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive review highlighting the advantages of AgNWs in flexible transparent electrodes (FTEs) is presented, focusing especially on the properties of conductivity and light transmittance.
Abstract: Recently, flexible transparent electrodes (FTEs) have attracted extensive attention as an essential element for future organic electronics (OEs), i.e. solution-processable, scalable and flexible organic electronics (FOEs). Although the traditional transparent electrode indium tin oxide (ITO) has been widely used in OEs, its brittleness and high cost significantly limit its application in the next generation of devices, typically flexible electronics. Thus, many alternatives, such as graphene, carbon nanotubes, conductive polymers, metal nanowires, metal grids and electrospun metallic nanofibers, have arisen at the forefront of FTEs. Among them, silver nanowire (AgNW) networks have attracted particular attention due to their excellent electrical conductivity and high transmittance, as well as facile availability and low cost. Since many studies on AgNWs have been published, a comprehensive review highlighting the advantages of AgNWs in FOEs is highly required. In this review, the synthesis and film fabrication of AgNWs have been firstly summarized, focusing especially on the properties of conductivity and light transmittance. Next, post treatments with different approaches to improve the conductivity of AgNWs have been included. And then, characterization of FTEs has been introduced with details on key parameters for FOEs. Furthermore, AgNW-based FOEs have been summarized to demonstrate the recent progress, such as organic light-emitting diodes (OLEDs), organic solar cells (OSCs), light-emitting electrochemical cells (LECs), organic field effect transistors (OFETs), organic memory devices (OMDs), etc. Finally, perspectives for AgNWs in FOEs have been discussed and concluded as well. It is expected that AgNWs could be the focus of future FOEs compared with other alternatives in terms of their advantages of optoelectronic properties, film-formation, solution-processability and flexibility.

113 citations

Journal ArticleDOI
TL;DR: In this paper, perovskite solar cells in planar p-i-n configuration based on single-step, anti-solvent-free, low-temperature (70 °C) slot-die-coated methylammonium lead tri-iodide (MAP...
Abstract: In this work, we report perovskite solar cells in the planar p–i–n configuration based on single-step, anti-solvent-free, low-temperature (70 °C) slot-die-coated methylammonium lead tri-iodide (MAP...

106 citations

Journal ArticleDOI
TL;DR: In this article, the progress reported in the literature where slot-die coating has been used for the deposition of both the perovskite layer and other layers in the solar cell device stack is discussed.
Abstract: To make perovskite solar cells an industrially relevant technology large area deposition techniques are needed and one of the most promising is slot-die coating. This review article details the progress reported in the literature where slot-die coating has been used for the deposition of both the perovskite layer and other layers in the perovskite solar cell device stack. An overview of the methods used to adapt the coating process, materials and drying conditions in order to create high quality layers and devices is given and an outlook on future research directions in this field is made.

84 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive overview of perovskite semiconductors is presented and an informed perspective of where this field is heading and what challenges we have to overcome to get to successful commercialization.
Abstract: Metal halide perovskites are the first solution processed semiconductors that can compete in their functionality with conventional semiconductors, such as silicon. Over the past several years, perovskite semiconductors have reported breakthroughs in various optoelectronic devices, such as solar cells, photodetectors, light emitting and memory devices, and so on. Until now, perovskite semiconductors face challenges regarding their stability, reproducibility, and toxicity. In this Roadmap, we combine the expertise of chemistry, physics, and device engineering from leading experts in the perovskite research community to focus on the fundamental material properties, the fabrication methods, characterization and photophysical properties, perovskite devices, and current challenges in this field. We develop a comprehensive overview of the current state-of-the-art and offer readers an informed perspective of where this field is heading and what challenges we have to overcome to get to successful commercialization.

81 citations