In this paper, program/erase (P/E) cycling characteristics of the novel p-type SONOS NeoFlash ® has been thoroughly discussed. The change of vertical location in the nitride and density distribution ...in energy span of the trapped charges after cycling has been observed. Different ONO thickness and process of nitride film results in different amount of cycling degradation. The contribution of interface traps and ONO trapped/residue-charges to P/E cycling degradation has been successfully distinguished.
A series of 9,9-diphenyl-9
H
-thioxanthene derivatives with different valence states of sulfur atoms are reported as host materials in blue phosphorescent organic light-emitting diodes. Their ...photophysical, electrochemical and thermal properties, as well as device performance were thoroughly investigated to study their structure-property relationships, including the different carbazolyl linkage positions and valence states of sulfur atoms. Extremely low turn-on voltages of around 2.6 V for blue electrophosphorescence, which are already corresponding to the value of the emitted photon energy (
hv
)/electron charge (
e
), were achieved by utilizing the developed materials as hosts of the blue phosphor dopant iridium(
iii
)bis(4,6-(difluorophenyl)-pyridinato-
N
,
C
2′
)picolinate (FIrpic). Notably, a maximal power efficiency of 69.7 lm W
−1
and an external quantum efficiency of 29.0% were achieved for an optimal device based on
m
-DCz-S consisting of the bivalent sulfur atom and
meta
-combined carbazolyl.
A series of 9,9-diphenyl-9
H
-thioxanthene derivatives are reported as host materials in blue phosphorescent OLEDs, giving a maximum power efficiency of 69.7 lm W
−1
and an external quantum efficiency of 29.0%.
碩士
國立臺灣大學
化學研究所
102
Increasing energy demands and the impact of global warming have been arisen huge need of renewable energy from environmentally benign resources in the past few decades. Conversion ...of solar energy into electricity via photovoltaic technologies provide the sustainable approaches to satisfy these issues. Both of dye-sensitized solar cells (DSSCs) and organic solar cells (OSCs) have been regarded as highly promising and cost-effective alternatives to the market dominated by silicon-based counterparts.
A donor-(π-conjugated spacer)-acceptor (D-π-A) system is the most widely adopted molecular architecture for organic dyes in DSSCs. The new dyes, BPDTA、BTTA, featuring two donor/acceptor chromophores aligned in a spiro-like con #64257;guration with two anchoring groups separated at a distance of 12.07 A (closely matching the distance between the adsorption sites of the anatase TiO2 surface) , a spiro-like configured central unit, and four n-heaxyl chains to diminish intermolecular interactions and
Two novel bipolar isomeric blue fluorophores, PPI-TPA-SO2-1 and PPI-TPA-SO2-2, consisting of electron-withdrawing phenanthro9,10-
d
imidazole and sulfone-locked electron-donating triphenylamine, were ...designed and synthesized. The sulfone lock induces a more twisted molecular conformation, and thus a higher triplet energy level and better triplet exciton confining ability compared with the analogue TPA-PPI without the sulfone lock. In addition, the introduced sulfone lock also offers the developed materials improved electron affinities and an electron dominant transporting ability. They were utilized as the blue emitter and the host for a yellow phosphorescent emitter to fabricate fluorescence-phosphorescence (F-P) hybrid white organic light-emitting diodes (WOLEDs) in a single-emissive-layer architecture, giving forward-viewing maximum current efficiencies of 44.2 and 47.6 cd A
−1
, power efficiencies of 49.5 and 53.4 lm W
−1
, and external quantum efficiencies of 14.4% and 15.6%, respectively, which are much higher than those of the devices based on TPA-PPI (29.5 cd A
−1
, 33.1 lm W
−1
, and 9.6%) due to their superior singlet and triplet exciton separation and utilization ability over TPA-PPI. These efficiencies are also the highest values ever reported for the F-P hybrid WOLEDs in a similar architecture, and their power efficiencies are even comparable with most reported highly efficient all phosphorescent WOLEDs without using any out-coupling technology.
Deep blue fluorophors incorporating sulfone-locked triphenylamine were developed for hybrid white OLEDs.
The latest research from Rockefeller University in the United States in 2014 found that humans can smell one trillion fragrances, and smell is one of the best ways to wake up memory. HERMES's ...exclusive perfumer, Elena, mentioned in his book "Perfume Master's Diary" that in life, smell is everywhere. Fruit vendors in the market, food from exotic restaurants, and so on, may all evoke the waves of imagination and become inspiration for making fragrance. As for the method of remembering scent, Elena used drawing to visually assist olfactory association in the diary to help herself remember the scent. In this research, we applied the GPT-2 algorithm in natural language learning in deep learning to allow computers to learn the method of perfumery by crawling the Internet. Let the computer learn how to scent and produce a formula. Although the computer does not have a sense of smell, it can still summarize and infer through various documents to produce the fragrance in memory for subsequent related research.
Traditional recommendation systems are mostly based on similarity discrimination which requires sufficient data and recommends high correlated items. It becomes very difficult to accurately recommend ...products when data are not enough. Thus, the research about Cold Start Problem becomes important which emphasizes in effective item recommendation when too little data are provided. In this work, we propose a novel method called Location-Time based Recommendation System (LTRS) to address the Cold Start Problem with location and time as the initial factors together with degree of membership from fuzzy theory to produce more effective and precise item recommendation. From experimental results, LTRS improves the effectiveness of item recommendation, not only in normal situations but also in Cold Start scenarios.
碩士
中華大學
資訊工程學系碩士班
100
The traditional recommendation system is mostly done by similarity discriminate
when the data is sufficient, and use the high correlation as recommendation items. It will become ...very difficult to produce accurate advertisements recommendation when the data is not enough. Therefore, some scholars explore the Cold-starting Problem: To resolve the recommendation effectively when too small amount of data is provided.
In this paper, we address the Cold-starting Problem by using location and time as the initial condition to produce accurate advertisements recommendation. Also, in the paper, we use fuzzy theory to obtain the objective value by the classification results with time, location and advertising attribution calculation, we call it as LTRS (Location-Time based Recommendation System). From the experimental results, the proposed LTRS can improve the accuracy of advertising, not only to improve the traditional recommendation system but also improve the recommended advertising accuracy of
