As a result, the solar cells with LiAc-doped CsPbI 2 Br give a champion PCE of 16.05%, which is much higher than that (12.39%) of the solar cells with pristine CsPbI 2 Br. Moreover, the LiAc-doped CsPbI 2 Br devices exhibit superior thermal stability with almost no PCE degradation after thermal aging test at 85 °C for over 300 h.
Learn more WhatsApp1 Introduction Colloidal quantum dot (CQD) solar cells (CQD-SCs) have become an attractive device for converting solar energy to electric power because CQD-SCs offer advantages such as easily adjustable absorption range and low-cost solution processability with
Learn more WhatsAppA new hole-transport layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate (PEDOT:PSS) with intercalated polyethylene glycol (PEG), was introduced into Pb-free inverted formamidinium tin triiodide (FASnI3) perovskite solar cells to reduce the energy-level mismatch between FASnI3 and PEDOT:PSS. Intercalation of PEG into the …
Learn more WhatsAppSelf-assembled monolayers (SAMs) have been successfully employed to enhance the efficiency of inverted perovskite solar cells (PSCs) and perovskite/silicon tandem solar cells due to their facile low-temperature processing and superior device performance. Nevertheless, depositing uniform and dense SAMs with h
Learn more WhatsAppThe quest for clean and sustainable energy sources has led to the exploration of solar energy as a promising solution to reduce reliance on finite fossil fuels. 1–9 Recently, organic solar cells (OSCs) have garnered increasing interest, primarily due to their unique advantages: lightweight, low cost, flexibility, and simple fabrication process. …
Learn more WhatsAppAn electron-transport layer with appropriate energy alignment and enhanced charge transfer is critical for perovskite solar cells (PSCs). In addition, interface stress and lattice distortion are in...
Learn more WhatsAppAn electron-transport layer with appropriate energy alignment and enhanced charge transfer is critical for perovskite solar cells (PSCs). In addition, interface stress and lattice distortion are inevitable during the crystallization process of perovskite. Herein, IT-4F is ...
Learn more WhatsAppFor efficient colloidal quantum dot (CQD) solar cells (CQD-SCs), thiol-passivated p-type CQDs are generally used as a hole-transporting material (HTM); however, there are issues with the control of optoelectrical …
Learn more WhatsAppHerein, a heterointerface energetics regulation (HER) strategy is proposed by introducing potassium trifluoroacetate (KTFA) in the perovskite precursor solution to …
Learn more WhatsAppDefects and energy offsets at the bulk and heterojunction interfaces of perovskite are detrimental to the efficiency and stability of perovskite solar cells (PSCs). Herein, we designed an amphiphilic π-conjugated ionic compound (QAPyBF 4), implementing simultaneous defects passivation and interface energy level alignments. ...
Learn more WhatsAppIn WBG devices, 2F not only accelerates hole extraction via energy level regulation but also minimizes interfacial non-radiative recombination by passivating …
Learn more WhatsAppA highly efficient inverted polymer solar cell (PSC) has been demonstrated by incorporating an insulating inorganic cerium fluoride (CeF3) layer between the annealing-free zinc oxide (ZnO) electron transport layer …
Learn more WhatsAppPoint defects can be categorized into shallow energy level defects and deep energy level defects based on the location of the defect energy level in the band gap. [62] Shallow energy level defects are located near the bottom of the conduction band or the top of the valence band, have a low formation energy, and are generally formed by …
Learn more WhatsAppSolar cells showed open-circuit voltages of up to 1.28 V in p-i-n single junctions and 2.00 V in perovskite-silicon tandem solar cells. The tandem cells achieve certified power conversion efficiencies of up to 32.5%.
Learn more WhatsAppThe safe and reliable installation of photovoltaic (PV) solar energy systems and their integration with the nation''s electric grid requires timely development of the foundational codes and standards governing solar deployment. Technological advances, new business ...
Learn more WhatsApp(e) The energy level diagram of the various layers in Sb 2 (S, Se) 3 solar cells with the structure of FTO/CdS/Sb 2 (S, Se) 3 /HTL/Au (HTL = MnS W, MnS W/O, and Spiro). To understand the effect of annealing treatment on the MnS HTL based Sb 2 (S, Se) 3 solar cells, the chemical states and the component elements in the MnS films with or …
Learn more WhatsAppDue to the good balance of efficiency and stability, CsPbI2Br perovskite solar cells (PSCs) recently have attracted widespread attention. However, the improvement in photovoltaic performance for CsPbI2Br PSCs was mainly limited by massive defects and unmatched energy levels. Surface modification is the most convenient and effective …
Learn more WhatsAppTherefore, the regulation of specific defects and corresponding energy level changes are observed. Appropriate energy level regulation can promote the directional transfer of charge carriers. Noteworthy, for the co-modification strategy, more MBMs are involved in charge-transfer doping, so there is a more substantial shift in the W …
Learn more WhatsApp3 · The efficiency of inverted PSCs with a 1.68 eV wide bandgap reached 22.92%, which is the highest datum of the reported 1.68 eV wide bandgap PSC. This lays the …
Learn more WhatsAppMBT-OCH 3 passivate the defects and improve the crystallization of perovskite. The increased electron density on coordination sites gives a positive effect on passivation. • Chemical anchoring and hydrophobicity of passivator raise the stability of PSCs. • MBT-OCH 3 device presents a PCE of 21.04 %, along with excellent stability.
Learn more WhatsAppIn this report, deep level transient spectroscopy is probed to determine defect concentrations and defect energy levels in all-inorganic CsPbI 3− x Br x perovskite solar cells. Combining that data with the density functional theory calculation, the dominant deep defect states are assigned to antisite defect pairs (Pb I and I Pb ) and interstitial …
Learn more WhatsAppThe morphological characteristics of the active layer in organic solar cells (OSCs), encompassing phase separation structure, domain sizes, crystallinity and …
Learn more WhatsAppFor efficient colloidal quantum dot (CQD) solar cells (CQD-SCs), thiol-passivated p-type CQDs are generally used as a hole-transporting material (HTM); however, there are issues with the control of optoelectrical properties, low thiol passivation rate, and poor morphology with a power conversion efficiency (PCE) of approximately 11%.
Learn more WhatsAppRecent advances in solar photovoltaic materials and systems ...
Learn more WhatsAppAdvanced Energy Materials is your prime applied energy journal for research providing solutions to today''s global energy challenges. Abstract In perovskite solar cells (PSCs), defective perovskite grain boundaries (GBs) and/or surface due to photo-excitation and the resulted suboptimal carrier dynamics at the perovskite/charge t...
Learn more WhatsAppSurface passivation by constructing a 2D/3D structure is considered to be an effective strategy for suppressing non-radiative recombination and improving the device efficiency and stability. Herein, the 2D perovskite is formed in situ on the surface of a 3D perovskite via chemical interactions between diethylammonium iodide (DAI) and Pb–I octahedra, which …
Learn more WhatsAppNext-generation solar cells, such as dye-sensitized solar cells (DSSCs) and perovskite solar cells (PSCs), are fabricated in a configuration where light absorbers are located between the electron …
Learn more WhatsAppAdvanced Energy Materials is your prime applied energy journal for research providing solutions to today''s global energy challenges. Abstract In the domain of perovskite photovoltaics, the heterointerfaces are subject to substantial trap-assisted non-radiative recombination, predominantly attributed to the energy offset, interfa...
Learn more WhatsAppIn addition to having proper energy levels and high hole mobility (μh) without the use of dopants, hole-transporting materials (HTMs) used in n-i-p-type perovskite solar cells (PSCs) should be processed using green solvents to enable environmentally friendly device fabrication. Although many HTMs have been assessed, due to the limited …
Learn more WhatsAppTo obtain renewable energy, one efficient and practical way is to harvest sunlight, the most abundant, safe and clean energy source, and convert it into electricity through solar cells. To date, various photovoltaic technologies 1 have been developed, including Si-based 2 and GaAs-based 3 inorganic solar cells, as well as perovskite, 4, 5 dye sensitized solar …
Learn more WhatsAppResidual tensile strain impedes the improvement of efficiency and intrinsic stability of perovskite solar cells (PSCs), resulting from the perovskite lattice distortion …
Learn more WhatsAppCharge extraction and transport in these solar cell devices are strongly influenced by the interfaces and in particular the energy …
Learn more WhatsAppInterfacial engineering is significantly important for achieving the high performance of perovskite solar cells. Exploring and developing universally efficient methods and strategies for interlayer optimization are greatly demanded by perovskite solar cells to reduce photovoltaic losses. By introducing small-molecule F4-TCNQ and …
Learn more WhatsAppThe energy level alignment at the donor/acceptor (D/A) interface is dictated by intrinsic surface dipoles, a characteristic influenced by molecular packing arrangements [49], [50].Furthermore, the energy level offset between donor and acceptor plays a key role in ...
Learn more WhatsAppThe dipole moment of interface materials has played the key role in efficient charge extraction in organic and hybrid perovskite solar cells, but the mechanisms of the interaction at the interface and of the resulting energy level alignment have not been well established. In this review, the decoupled dipole
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