KAUST Repository :443 The KAUST Repository digital repository system captures, stores, indexes, preserves, and distributes digital research material. Wed, 26 May 2021 06:52:41 GMT 2021-05-26T06:52:41Z Kidney paired donation in Brazil 每 A single center perspective http://hdl.handle.net/10754/669243 Kidney paired donation in Brazil 每 A single center perspective Bastos, Juliana; Mankowski, Michal; Gentry, Sommer; Massie, Allan; Levan, Macey; Bisi, Cellen; Stopato, Carlos; Freesz, Thais; Colares, Vin赤cius; Segev, Dorry; Ferreira, Gustavo The number of kidney transplants (KT) performed annually in Brazil is less than half of the estimated necessity, leading to a waitlist containing over 26 thousand patients [1]. A recent Brazilian analysis showed that highly sensitized patients (panel-reactive antibody (PRA) > 80%) make up 7.6% of the waitlist. They have only a 19% chance to receive a transplant after 10 years (vs. 44% chance for patients with PRA 0%) and 20% higher mortality rates [2]. Mon, 24 May 2021 00:00:00 GMT http://hdl.handle.net/10754/669243 2021-05-24T00:00:00Z Electron-Selective ?Lithium Contacts for Crystalline Silicon Solar Cells http://hdl.handle.net/10754/669244 Electron-Selective ?Lithium Contacts for Crystalline Silicon Solar Cells Kang, Jingxuan; Yang, Xinbo; Liu, Wenzhu; Liu, Jiang; Xu, Hang; Allen, Thomas; De Wolf, Stefaan Separating photogenerated charge carriers by carrier-selective heterostructure contacts rather than by doped homojunctions is a promising pathway to approach the theoretical power conversion efficiency (PCE) limit of crystalline silicon (c-Si) solar cells. An electron-selective, hole-blocking lithium contact for c-Si solar cells is presented by simple thermal evaporation of air-stable Li3N powder. It is found that this lithium contact introduces only a minimal Schottky-barrier height for electron transport at its interface with lightly doped n-type c-Si surfaces, resulting in a low contact resistivity of 12.8 m次 cm2. By implementing a full-area electron-selective lithium contact, an n-type c-Si solar cell with a PCE of 19% is achieved, representing a 4% absolute PCE improvement over reference devices with an aluminum contact. The choices of electron-selective contact materials for photovoltaic devices, using simple, scalable fabrication methods are extended. Mon, 24 May 2021 00:00:00 GMT http://hdl.handle.net/10754/669244 2021-05-24T00:00:00Z Global Plastic Pollution Observation System to Aid Policy http://hdl.handle.net/10754/669242 Global Plastic Pollution Observation System to Aid Policy Bank, Michael S.; Swarzenski, Peter W.; Duarte, Carlos M.; Rillig, Matthias C.; Koelmans, Albert A.; Metian, Marc; Wright, Stephanie; Provencher, Jennifer F.; Sanden, Monica; Jordaan, Adrian; Wagner, Martin; Thiel, Martin; Ok, Yong Sik Plastic pollution has become one of the most pressing environmental challenges and has received commensurate widespread attention. Although it is a top priority for policymakers and scientists alike, the knowledge required to guide decisions, implement mitigation actions, and assess their outcomes remains inadequate. We argue that an integrated, global monitoring system for plastic pollution is needed to provide comprehensive, harmonized data for environmental, societal, and economic assessments. The initial focus on marine ecosystems has been expanded here to include atmospheric transport and terrestrial and freshwater ecosystems. An earth-system-level plastic observation system is proposed as a hub for collecting and assessing the scale and impacts of plastic pollution across a wide array of particle sizes and ecosystems including air, land, water, and biota and to monitor progress toward ameliorating this problem. The proposed observation system strives to integrate new information and to identify pollution hotspots (i.e., production facilities, cities, roads, ports, etc.) and expands monitoring from marine environments to encompass all ecosystem types. Eventually, such a system will deliver knowledge to support public policy and corporate contributions to the relevant United Nations (UN) Sustainable Development Goals (SDGs). Mon, 24 May 2021 00:00:00 GMT http://hdl.handle.net/10754/669242 2021-05-24T00:00:00Z Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer http://hdl.handle.net/10754/669241 Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer Khan, Jafar Iqbal; Alamoudi, Maha A; Chaturvedi, Neha; Ashraf, Raja; Nabi, Mohammed N.; Markina, Anastasia; Liu, Wenlan; Dela Pe?a, Top Archie; Zhang, Weimin; Al谷v那que, Olivier; Harrison, George T.; Alsufyani, Wejdan; Levillain, Eric; De Wolf, Stefaan; Andrienko, Denis; McCulloch, Iain; Laquai, Fr谷d谷ric Advancing non-fullerene acceptor (NFA) organic photovoltaics requires the mitigation of the efficiency-limiting processes. Acceptor end-group and side-chain engineering are two handles to tune properties, and a better understanding of their specific impact on the photophysics could facilitate a more guided acceptor design. Here, the device performance, energetic landscape, and photophysics of rhodanine and dicyanovinyl end-capped IDT-based NFAs, namely, O-IDTBR and O-IDTBCN, in PCE10-based solar cells are compared by transient optical and electro-optical spectroscopy techniques and density functional theory calculations. It is revealed how the acceptors* quadrupole moments affect the interfacial energetic landscape, in turn causing differences in exciton quenching, charge dissociation efficiencies, and geminate versus non-geminate recombination losses. More precisely, it is found that the open circuit voltage (VOC) is controlled by the acceptors* electron affinity (EA), while geminate and non-geminate recombination, and the field dependence of charge generation, rely on the acceptors* quadrupole moments. The kinetic parameters and yields of all processes are determined, and it is demonstrated that they can reproduce the performance differences of the devices* current每voltage characteristics in carrier drift-diffusion simulations. The results provide insight into the impact of the energetic landscape, specifically the role of the quadrupole moment of the acceptor, beyond trivial considerations of the donor每acceptor energy offsets. Mon, 24 May 2021 00:00:00 GMT http://hdl.handle.net/10754/669241 2021-05-24T00:00:00Z HoMEmenuCopyrights 2015.All rights reserved.More welcome - Collect from power by english Blok number sss85786789633111 Copyright