Formamidinium (FA)-rich lead iodide perovskite solar cells (PSCs) are gaining popularity because of their excellent photovoltaic performance. Nevertheless, the FA-rich perovskites processed by a two-step sequential deposition method usually possess...

Modulation of Nucleation and Crystallization in PbI2 Films Promoting Preferential Perovskite Orientation Growth for Efficient Solar Cells

MXenes for Optoelectronic Devices

The 2D transition metal carbides/nitrides (2D MXenes) are a versatile class of 2D materials for photovoltaic (PV) systems. The numerous advantages of MXenes, including their excellent metallic conductivity, high optical transmittance, solution processability, tunable work‐function, and hydrophilicity, make them suitable for deployment in PV technology. This comprehensive review focuses on the synthesis methodologies and properties of MXenes and MXene‐based materials for PV systems. Titanium carbide MXene (Ti3C2Tx), a well‐known member of the MXene family, has been studied in many PV applications. Herein, the effectiveness of Ti3C2Tx as an additive in different types of PV cells, and the synergetic impact of Ti3C2Tx as an interfacial material on the photovoltaic performance of PV cells, are systematically examined. Subsequently, the utilization of Ti3C2Tx as a transparent conductive electrode, and its influence on the stability of the PV cells, are discussed. This review also considers problems that emerged from previous studies, and provides guidelines for the further exploration of Ti3C2Tx and other members of the 2D MXene family in PV technology. This timely study is expected to provide comprehensive understanding of the current status of MXenes, and to set the direction for the future development in 2D material design and processing for PVs.

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/advs.202104743

2D MXene: A Potential Candidate for Photovoltaic Cells? A Critical Review

Metal halide perovskites have been studied in semiconductor fields such as light-emitting diodes (LEDs) and solar cells owing to their simple manufacturing, high optoelectronic performance, and low manufacturing cost. In this regard, spin-coating method facilitates the fabrication of perovskite devices. However, the spin-coating method for perovskite film deposition is difficult to finely control the thickness and form a uniform surface. Thus. the thermal evaporation method was proposed to overcome these shortcomings. This method provides better reproducibility and film quality than the spin-coating method. In this review, the spin-coating method and thermal evaporation method used to manufacture perovskite thin films will be explained. Moreover, the basic principles of perovskite devices (LEDs, solar cells, memory, X-ray detectors) are explained, and research on perovskite devices developed using thermal evaporation is summarized. 

Recent progress of perovskite devices fabricated using thermal evaporation method: Perspective and outlook

The perovskite film prepared by traditional two-step sequential deposition possesses a large number of defects and excess lead iodide (PbI2), mainly due to the formation of dense PbI2 layer and...

Omnidirectional Diffusion of Organic Amine Salts Assisted by Ordered Arrays in Porous Lead Iodide for Two-Step Deposited Large-Area Perovskite Solar Cells

Tuning the reactivity of PbI2 film via monolayer Ti3C2Tx MXene for two-step-processed CH3NH3PbI3 solar cells

Anion effect on properties of Zn-doped CH3NH3PbI3 based perovskite solar cells

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Tuning the reactivity of PbI2 film via monolayer Ti3C2Tx MXene for two-step-processed CH3NH3PbI3 solar cells

Anion effect on properties of Zn-doped CH3NH3PbI3 based perovskite solar cells