Light soaking and hysteresis phenomena can reveal the bulk interfacial polarization effects on photovoltaic processes in perovskite solar cells. The frequency-dependent impedance time-dependent photoluminescence measurements indicate that polarizations are internally coupled developing short-circuit current, open-circuit voltage, fill factor through charge dissociation, transport, collection light phenomena.

Electron and hole transport layers have critical impacts on the overall performance of perovskite solar cells (PSCs). Herein, for first time, a solution-processed cobalt (Co)-doped NiOX film was fabricated as layer in inverted planar PSCs, exhibit 18.6% power conversion efficiency. It has been found that an appropriate Co-doping can significantly adjust work function enhance electrical conductivity film. Capacitance–voltage (C–V) spectra time-resolved photoluminescence indicate clearly...

LSM-tree based key-value (KV) stores suffer severe read performance loss due to the leveled structure of LSM-tree. Especially, when modern storage devices with high bandwidth and low latency are used, KV store is seriously affected by inefficient file indexing. Besides, deletion pattern inserting tombstones, on faced problem fluctuations that caused large-scale data (also referred as Read-After-Delete problem). In this article, TridentKV proposed improve stores. An adaptive learned index...

A matrix is said to be a rational function (RFM) if each entry in the of independent parameters with real coefficients. linear time-invariant system (RFS) its coefficient matrices RFM. The Lebesgue measure set points parameter space RFS introduced define structural controllability and observability (SC-SO) RFS. Some criteria for SC-SO are proven some illustrative examples given.

Memory disaggregation is a promising architecture for modern datacenters that separates compute and memory resources into independent pools connected by ultra-fast networks, which can improve utilization, reduce cost, enable elastic scaling of resources. However, existing solutions based on remote direct access (RDMA) suffer from high latency additional overheads including page faults code refactoring. Emerging cache-coherent interconnects such as CXL offer opportunities to reconstruct...

Disaggregated memory separates compute and resources into independent pools connected by fast RDMA (Remote Direct Memory Access) networks, which can improve utilization, reduce cost, enable elastic scaling of resources. Hash indexes provide high-performance single-point operations are widely used in distributed systems databases. However, under disaggregated memory, existing hash suffer from write performance degradation due to high resize overhead concurrency control overhead. Traditional...

Recent studies have shown that introductions of some organic additives are beneficial for optimizing organic–inorganic hybrid perovskite (OIHP) optoelectronic properties to promote their industrial realizations. In this work, a typical molecule bathocuproine (BCP) has been utilized during the preparation methylammonium lead tribromide (CH3NH3PbBr3) precursor, and perovskite-based light-emitting diode (PeLED) consisting ITO(glass)/PEDOT:PSS/CH3NH3PbBr3:BCP/Bphen/Ag was fabricated. Because...

Abstract Background Studies on professional identity and related factors among Chinese general practitioners (GPs) are unavailable. The objective of this study was to investigate the level GPs in China explore associated with GPs’ perceptions their identity. Methods A multistage stratified random sampling method used collect data a structured self-administered questionnaire from 3236 working community health service institutions (CHIs) between October, 2017 February, 2018. Professional...

In this study, we have fabricated thermoelectric devices with p-type and n-type conducting polymers research the effect of device structure properties. It was found that greatly enhances device's electrical conductivity due to separated charge carrier channels, but Seebeck coefficient reduced increase density by doping. Photoexcitation can improve properties increasing doping concentration simultaneously. The increases in both are phonon–electron coupling effect: electrons holes increased...

A nonfullerene acceptor (NFA), named 3,9‐bis(2‐methylene‐(3‐(1,1‐dicyanomethylene)‐indanone))‐5,5,11,11‐tetrakis(4‐hexylphenyl)‐dithieno[2,3‐d:2′,3′‐d′]‐s‐indaceno[1,2‐b:5,6‐b′] dithiophene (ITIC) with the fused aromatic conjugated backbone structure, is an intriguing small molecular semiconductor in application of organic bulk heterojunction (BHJ) solar cells. However, underlying spin‐dependent photo‐physics photovoltaic process remains deficient. Here, ITIC‐based thin solid film, binary,...

The reducibility condition of a class rational function matrices is derived. It pointed out that the coefficient matrix any resistor-inductor-capacitor (RLC) network such matrix, which implies results obtained here can be applied to RLC networks and this paper has effects on connecting algebra electrical theory.

Introducing optically polarizable molecules into perovskite solar cells can enhance photovoltaic actions.

Light-soaking and hysteresis phenomena can reveal the bulk interfacial polarization effects on photovoltaic processes in perovskite solar cells. In article number 1500279, Bin Hu co-workers report use of frequency-dependent impedance time-dependent photoluminescence measurements to determine that polarizations are internally coupled developing short-circuit current, open-circuit voltage, fill factor through charge dissociation, transport, collection light-soaking phenomena.

Cloud storage is gaining popularity because features such as pay-as-you-go significantly reduce costs. However, the community has not sufficiently explored its contract model and latency characteristics. As LSM-Tree-based key-value stores (LSM stores) become building block for numerous cloud applications, how would impact performance of accesses vital. This study reveals significant variances Amazon Elastic Block Store (EBS) under various I/O pressures, which challenges LSM store read on...

An injective k-coloring of a graph G is an assignment k colors to the vertices so that any two with common neighbor receive distinct colors, and χ i (G) chromatic number G. Dimitrov et al. proved ≤ Δ(G) + 2 for planar g(G) ≥ 7. In this paper, we show if 7 7, then 1.

Persistent key-value (KV) stores are an integral part of storage infrastructure in data centers. Emerging non-volatile memory (NVM) technologies potential alternatives for future architecture design. In this study, we use NVM to optimize the KV store and propose RangeKV, LSM-tree based persistent built on a heterogeneous architecture. RangeKV uses RangeTab manage L0 increases capacity reduce number LSM tree levels system compactions. pre-constructs hash index access times adopts...

Revealing the role of spin-triplets and trap states in recombination dissociation processes PSCs.

Two different electrogenerated chemiluminescence (ECL) systems, Ru(bpy)32+/TPrA and Ru(bpy)32+/C2O42–, are chosen to study the relationship between sign of exchange interaction in radical pairs magnetic field effects (MFEs) on intensity (MFEECL). A positive MFEECL up 210% is observed for system, while a negative only −33% based Ru(bpy)32+/C2O42– system. The significant difference ascribed signs [Ru(bpy)33+···TPrA•] [Ru(bpy)33+···CO2–•] because they have distant proximate separation distance...

Learned Index, which utilizes effective machine learning models to accelerate locating sorted data positions, has gained increasing attention in many big scenarios. Using efficient learned models, the indexes build large nodes and flat structures, thereby greatly improving performance. However, most of state-of-the-art are designed for DRAM, there is hence an urgent need enable high-performance emerging Non-Volatile Memory (NVM). In this article, we first evaluate analyze performance...

The separability condition for the RLC network over field Fz of rational functions in multi-parameters is derived. Some criteria and technique are proposed to check reducibility characteristic polynomial network. straightforward since it only necessary observe its graph. © 1998 John Wiley & Sons, Ltd.

Organic–inorganic hybrid perovskites simultaneously possess strong spin–orbit coupling (SOC) and structure inversion asymmetry, establishing a Rashba effect to influence light emission photovoltaics. Here, we use mechanical bending as convenient approach investigate the through SOC in perovskite (MAPbI3–xClx) films by elastically deforming grains. It is observed that applying concave can broaden line shape of magnetophotocurrent, increasing internal magnetic parameter B0 from 121 205 mT,...