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| 1 | Improving metal reflectors by suppressing surface plasmon polaritons: a priori calculation of the internal reflectance of a solar cell显示文摘Imperfect internal reflectance of near-bandgap light reduces the performance of all solar cells,and becomes increasingly detrimental as absorbers become thinner.We consider light incident on the silicon/dielectric/metal structure at the back of rear-passivated crystalline silicon solar cells with surface textures that are large enough for geometric optics.By calculating the absorbance in the metal as a function of the angle of incidence,we discover three results that are important for understanding and improving rear reflectors in many types of solar cells.First,significant parasitic absorption occurs in the metal layer in two cases:s-and p-polarized propagating modes(near-normal angles of incidence)when the dielectric thickness is adjusted to cause destructive interference of the reflected beams,and p-polarized evanescent modes(angles of incidence above the semiconductor/dielectric critical angle)that excite surface plasmon polaritons at the metal surface.Second,the latter loss dominates;a well-designed rear dielectric passivation layer must suppress the penetration of evanescent waves to the metal.Third,when used as an input in a simple analytical model,the average rear internal reflectance calculated by assuming a Lambertian angular distribution of light accurately predicts the total reflectance and absorbance of a solar cell. | Zachary C Holman Stefaan De Wolf Christophe Ballif | 2013 | Light(Science & Applications)2013，2，1： | 2 |
| 2 | Cationic polymer based gene delivery systems显示文摘 | Stefaan C De Smedt Demeester J Hennink WE | 2000 | Pharmaceutical Res2000，17，2： | 1 |
| 3 | The in vitro evaluation of ‘azo containing polysaccharide gels’ for colon delivery显示文摘 | Barbara Stubbe Bart Maris Guy Van den Mooter Stefaan C De Smedt Joseph Demeester | 2001 | Journal of Controlled Release2001，，1： | 1 |
| 4 | Measuring attention bias to threat in childrenand adolescents:A matter of speed显示文摘 | Stefaan V D Geert C | 2009 | Journal of Behavior Therapyand Experimental Psychiatry2009，40，： | 1 |
| 5 | Nitrogen mineralization of vegetable root residues and green manures as related to their (bio) chemical composition显示文摘 | Barbara C Stefaan D N Georges H | 2004 | Europ J Agronomy2004，21，： | 1 |
| 6 | Cationic polymer based gene delivery systems显示文摘 | STEFAAN C SMEDT D DEMEESTER J | 2000 | Pharmaceutical Re- search2000，17，2： | 1 |
| 7 | Graft dilatation and Barrett’s esophagus in adults after gastric pullup and jejunal interposition for long-gap esophageal atresia显示文摘BACKGROUND Esophageal replacement(ER)with gastric pull-up(GPU)or jejunal interposition(JI)used to be the standard treatment for long-gap esophageal atresia(LGEA).Changes of the ER grafts on a macro-and microscopic level however,are unknown.AIM To evaluate long-term clinical symptoms and anatomical and mucosal changes in adolescents and adults after ER for LGEA.METHODS A cohort study was conducted including all LGEA patients≥16 years who had undergone GPU or JI between 1985-2003 at two tertiary referral centers in the Netherlands.Patients underwent clinical assessment,contrast study and endoscopy with biopsy.Data was collected prospectively.Group differences between JI and GPU patients,and associations between different outcome measures were assessed using the Fisher’s exact test for bivariate variables and the Mann-Whitney U-test for continuous variables.Differences with a P-value<0.05 were considered statistically significant.RESULTS Nine GPU patients and eleven JI patients were included.Median age at follow-up was 21.5 years and 24.4 years,respectively.Reflux was reported in six GPU patients(67%)vs four JI patients(36%)(P=0.37).Dysphagia symptoms were reported in 64%of JI patients,compared to 22%of GPU patients(P=0.09).Contrast studies showed dilatation of the jejunal graft in six patients(55%)and graft lengthening in four of these six patients.Endoscopy revealed columnar-lined esophagus in three GPU patients(33%)and intestinal metaplasia was histologically confirmed in two patients(22%).No association was found between reflux symptoms and macroscopic anomalies or intestinal metaplasia.Three GPU patients(33%)experienced severe feeding problems vs none in the JI group.The median body mass index of JI patients was 20.9 kg/m^(2) vs 19.5 kg/m^(2) in GPU patients(P=0.08).CONCLUSION The majority of GPU patients had reflux and intestinal metaplasia in 22%.The majority of JI patients had dysphagia and a dilated graft.Follow-up after ER for LGEA is essential. | Eleonora Sofie van Tuyll van Serooskerken Gabriele Gallo Bas L Weusten Jessie Westerhof Lodewijk AA Brosens Sander Zwaveling Jetske Ruiterkamp Jan BF Hulscher Hubertus GM Arets Arnold JN Bittermann David C van der Zee Stefaan HAJ Tytgat Maud YA Lindeboom | 2023 | World Journal of Gastrointestinal Endoscopy2023，15，9： | 0 |
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