Perovskite solar cells

The semiconductor perovskite CsPbBr2I was doped with Mn2+ to modulate its optical and photovoltaic performance. The Mn2+-doped CsPb0.9Mn0.1Br2I exhibited improved crystalline quality. Ultraviolet and visible spectroscopy of Mn2+-doped CsPb0.9Mn0.1Br2I revealed enhanced absorption capacity. Although the efficiency was not as good as desired, the enhanced light absorption of CsPb0.9Mn0.1Br2I still boosted the photovoltaic performance when it was utilized as a light absorber in perovskite solar cells, along with a low-cost carbon electrode. Compared with its counterpart CsPbBr2I, the doped CsPb0.9Mn0.1Br2I based solar cells demonstrated long-term air stability. Not only long-lasting stability was achieved by doping with Mn2+, the toxicity was also lessened by replacing the amount of hazardous lead in perovskite with harmless manganese

Cross-Camera Human Motion Transfer by Time Series Analysis

Along with advances in optical sensors is the increasingly common practice of building an imaging system with heterogeneous cameras. While high-resolution (HR) video acquisition and analysis benefit from hybrid sensors, the intrinsic characteristics of multiple cameras lead to a challenging motion transfer problem. In this paper, we propose an algorithm using time series analysis for motion transfer among multiple cameras. Specifically, we first identify seasonality in the motion data, and then build an additive time series model to extract patterns that could be transferred across different cameras. Our approach has a complete and clear mathematical formulation, and the algorithm is also efficient and interpretable. Through the experiment on real-world data, we demonstrate the effectiveness of our method. Furthermore, our motion transfer algorithm could combine with and facilitate downstream tasks, e.g., enhancing pose estimation on low-resolution (LR) videos with inherent patterns extracted from HR ones.Comment: 10 pages, 9 figure

In Situ Polymerized pCBT Composites with Aligned Carbon Nanotube Buckypaper: Structure and Properties

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/110607/1/macp201400443.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/110607/2/macp201400443-sup-0001-S1.pd

Perovskite CsPbBr3 Solar Cells With Novel Hole-Transporting Layer of Metal Complexes

For the first time, the novel application of Schiff-base copper complexes in all-inorganic perovskite CsBrBr3 solar cells has been explored and turns out they could be utilized as effective hole-transporting materials. Schiff-base copper complexes with halogen ligands (R=Cl and Br) are synthesized with an ease approach at a low cost, both of which exhibit decent power conversion efficiency of 4.55% and 5.71%, respectively, when being constructed into solar devices as hole transport layers. Thanks to high thermal/chemical stability of those Schiff-base metal complexes, the strengthened stability was achieved which is comparable to that of carbon-based CsBrBr3 solar cells. Although the power conversion efficiency is not as competitive as expected, the great potential exists for further optimizing the functionality of perovskite solar devices by finely tuning the photovoltaic properties of those Schiff-base metal complexes through coordinating ligands or replacing with other transition metals

Case report: BCR-ABL-positive acute lymphoblastic leukemia with bone destruction: a treatment dilemma

Although bone destruction and hypercalcemia without acute peripheral blast BCR-ABL-positive acute lymphoblastic leukemia (ALL) have been reported in children, they are rare in adults. Herein, we describe a case of BCR-ABL positive ALL with a triploid karyotype, WT1, and CDKN2A mutations with hypercalcemia and bone destruction as the first manifestations. Complete remission (CR) was achieved by induction chemotherapy. BCR-ABL turned negative after treatment with dasatinib. However, computed tomography and whole-body bone scan showed extensive bone destruction. Additionally, bone biopsy showed leukemic infiltration. After treatment with dasatinib and VMCP, leukemia recurred with positive BCR-ABL. The T315I mutation occurred. The patient was surgically diagnosed with calculous cholecystitis and achieved CR2 by postoperative orebatinib and VP regimens. Later, the patient died due to a severe pulmonary infection. BCR-ABL-positive ALL with bone destruction is rare and difficult to control using tyrosine kinase inhibitor chemotherapy alone. Therefore, further exploration of more effective treatments is needed

Realizing In-Memory Baseband Processing for Ultra-Fast and Energy-Efficient 6G

To support emerging applications ranging from holographic communications to extended reality, next-generation mobile wireless communication systems require ultra-fast and energy-efficient baseband processors. Traditional complementary metal-oxide-semiconductor (CMOS)-based baseband processors face two challenges in transistor scaling and the von Neumann bottleneck. To address these challenges, in-memory computing-based baseband processors using resistive random-access memory (RRAM) present an attractive solution. In this paper, we propose and demonstrate RRAM-implemented in-memory baseband processing for the widely adopted multiple-input-multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) air interface. Its key feature is to execute the key operations, including discrete Fourier transform (DFT) and MIMO detection using linear minimum mean square error (L-MMSE) and zero forcing (ZF), in one-step. In addition, RRAM-based channel estimation module is proposed and discussed. By prototyping and simulations, we demonstrate the feasibility of RRAM-based full-fledged communication system in hardware, and reveal it can outperform state-of-the-art baseband processors with a gain of 91.2$\times$ in latency and 671$\times$ in energy efficiency by large-scale simulations. Our results pave a potential pathway for RRAM-based in-memory computing to be implemented in the era of the sixth generation (6G) mobile communications.Comment: arXiv admin note: text overlap with arXiv:2205.0356