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1.
The effect of polymer molecular weight on the performance of PTB7-Th:O-IDTBR non-fullerene organic solar cells
Sebastian F. Hoefler, Egon Pavlica, Gvido Bratina, 2018, original scientific article

Abstract: Recent advances in the development of non-fullerene acceptors have increased the power conversion efficiency of organic solar cells to approximately 13%. Fullerene-derivatives and non-fullerene acceptors possess distinctively different structural, optical and electronic properties, which also change the requirements on the polymer donor in non-fullerene organic solar cells. Therefore, in this study, the effect of the molecular weight of the conjugated polymer on the photovoltaic performance, charge carrier mobility, crystallization properties, film morphology, and non-geminate recombination dynamics is systematically investigated in polymer:small molecule organic solar cells using the low bandgap polymer PTB7-Th as the donor and the non-fullerene indacenodithiophene-based small molecule O-IDTBR as the acceptor. Among the examined polymer samples (50–300 kDa), high molecular weights of PTB7-Th (with an optimum molecular weight of 200 kDa) are advantageous to achieve high efficiencies up to 10%, which can be correlated with an increased crystallinity, an improved field-effect hole mobility (1.05 × 10−2 cm2 V−1 s−1), lower charge carrier trapping and a reduced activation energy of charge transport (98 meV). Bias-assisted charge extraction and transient photovoltage measurements reveal higher carrier concentrations (1016 cm−3) and long lifetimes (4.5 μs) as well as lower non-geminate recombination rate constants in the corresponding devices, supporting the high photocurrents (ca. 15.2 mA cm−2) and fill factors (>60%).
Keywords: organski polprevodniki, gibljivost, organske sončne celice
Published in RUNG: 28.05.2018; Views: 4326; Downloads: 0
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2.
Postopek za shranjevanje električne energije v trdni snovi
Matjaž Valant, patent

Keywords: shranjevanje električne energije, elektroliza, gorivne celice, kloridi
Published in RUNG: 22.12.2017; Views: 5702; Downloads: 0
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4.
Vpliv onesnažil iz okoljskih aerosolov na tarčne celice v pljučih
Sara Pribovšek, 2016, undergraduate thesis

Abstract: Diplomsko delo obravnava vpliv onesnažil iz okoljskih aerosolov na dva celična tipa, ki jih najdemo v pljučih, pljučne epitelijske celice A549 in makrofage J774A.1. Kot vir onesnažil smo uporabili ekstrakt saj iz zračnega filtra. Uporabili smo kvarčne zračne filtre z delci črnega ogljika, ki so nastali kot posledica gorenja sveče. V laboratorijskih poskusih smo testirali neposredni vpliv saj na celično živost (viabilnost) pljučnih epitelijskih celic in makrofagov po 24 urah in 48 urah inkubacije z različnimi koncentracijami saj in kontrolama. Celično živost smo merili s pomočjo reagenta Presto Blue. Posreden vpliv saj na pljučne epitelijske celice smo preverjali z merjenjem celične živosti po 24 urah in 48 urah inkubacije s topnimi dejavniki, ki so jih sprostili tretirani in kontrolni makrofagi (gojišče MCM). Gojišče MCM smo pripravili tako, da smo makrofage 48 ur aktivirali z raztopino saj oziroma jih nismo aktivirali (kontrolno gojišče MCM). Na koncu smo pri obeh celičnih tipih ugotavljali tudi gensko stabilnost s pomočjo posredne imunofluorescentne metode. Celice smo označili s protitelesi anti-fosfo histon H2A.X, ki so se vezala na mesta, kjer je zaradi izpostavljenosti raztopini saj prišlo do poškodb DNA. Rezultati so pokazali, da raztopina saj vpliva na celično živost pljučnih epitelijskih celic in makrofagov v obratno sorazmernem trendu v odvisnosti od koncentracije saj. Raztopina saj je imela vpliv tudi na morfološke spremembe obeh celičnih linij. Rezultati vpliva topnih dejavnikov makrofagov na epitelijske pljučne celice niso pokazali statistično značilnih razlik, zato posrednega vpliva saj na viabilnost pljučnih celic zaradi kompleksnosti delovanja topnih faktorjev makrofagov nismo dokazali. Pokazali pa smo, da imajo saje velik vpliv tudi na gensko stabilnost pljučnih epitelijskih celic in makrofagov. V diplomskem delu smo tako pokazali, da že krajša izpostavljenost onesnažilom iz zraka vodi do poškodb DNA in zmanjšane celične živosti tarčnih celic, kar je bilo še zlasti izrazito pri makrofagih.
Keywords: makrofagi, pljučne epitelijske celice, delci, policiklični aromatski ogljikovodiki, celična živost, genotoksičnost.
Published in RUNG: 09.03.2016; Views: 6740; Downloads: 195
.pdf Full text (7,73 MB)

5.
High-resolution X-ray absorption spectrometry of atomic vapors
Iztok Arčon, Jana Padežnik Gomilšek, Alojz Kodre, Andrej Mihelič, 2004, original scientific article

Abstract: A measurement of an x-ray absorption spectrum of a monatomic sample yields pure atomic absorption essential for the EXAFS (Extended X-ray Absorption FineStructure) analysis in cases of a weak structural signal. A construction of an absorption cell to contain vapor sample takes into account specific properties of the investigated element. Metal-vapor absorption cells for the elements K, zn, Rb, Cd, Cs, and Hg are presented and comments are made on the use of materials and the operating mechanisms of the cells.
Keywords: X-žarki, absorpcija, EXAFS, absorpcijske celice
Published in RUNG: 10.07.2015; Views: 4911; Downloads: 27
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6.
Izboljšava izkoristka fotonapetostnega modula
Matej Boltar, 2012, undergraduate thesis

Keywords: fotovoltaika, fotonapetostne celice, fotonapetostni modul, fotonapetostna elektrarna, diplomske naloge
Published in RUNG: 15.10.2013; Views: 7075; Downloads: 387
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7.
Izdelava simulacijskega modela gorivne celice v programskem orodju Scicio
Sandi Marinič, 2008, undergraduate thesis

Keywords: diplomske naloge, modeliranje dinamičnih sistemov, gorivne celice, računalniška simulacija
Published in RUNG: 15.10.2013; Views: 6115; Downloads: 354
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8.
Analiza energetskih izkoristkov tehnologij za pridobivanje in pretvorbo vodika
Dean Cotič, 2010, master's thesis

Keywords: vodik, pridobivanje, parni reforming, elektroliza vode, gorivne celice, energetski izkoristek
Published in RUNG: 15.10.2013; Views: 6167; Downloads: 540
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9.
Visualization and dynamics of flaviviral RNA in living cells
Lisa Miorin, 2011, doctoral dissertation

Keywords: virusi RNA, flavivirusni RNA, sledenje, žive celice, replikon TBEV, virologija, disertacije
Published in RUNG: 15.10.2013; Views: 4456; Downloads: 276
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10.
Vpliv fenilbutirata na aktivnost z AMP aktivirane protein-kinaze v sesalskih celicah
Tina Kocjan, 2013, undergraduate thesis

Keywords: fenilbutirat, protein-kinaza, celične kulture, imunodetekcija, sesalne celice, diplomske naloge
Published in RUNG: 15.10.2013; Views: 6712; Downloads: 435
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