In-Situ Formed Type I Nanocrystalline Perovskite Film for Highly Efficient Light-Emitting Diode.

Excellent color purity with a tunable band gap renders organic-inorganic halide perovskite highly capable of performing as light-emitting diodes (LEDs). Perovskite nanocrystals show a photoluminescence quantum yield exceeding 90%, which, however, decreases to lower than 20% upon formation of a thin film. The limited photoluminescence quantum yield of a perovskite thin film has been a formidable obstacle for development of highly efficient perovskite LEDs.

Long-term stable stacked CsPbBr quantum dot films for highly efficient white light generation in LEDs.

We report highly efficient ethyl cellulose with CsPbBr perovskite QD films for white light generation in LED application. Ethyl cellulose with CsPbBr quantum dots is applied with SrSiN : Eu red phosphor on an InGaN blue chip, achieving a highly efficient luminous efficacy of 67.93 lm W under 20 mA current.

High power laser-driven ceramic phosphor plate for outstanding efficient white light conversion in application of automotive lighting.

We report on Y3Al5O12: Ce(3+) ceramic phosphor plate (CPP) using nano phosphor for high power laser diode (LD) application for white light in automotive lighting. The prepared CPP shows improved luminous properties as a function of Ce(3+) concentration. The luminous properties of the Y3Al5O12: Ce(3+) CPP nano phosphor are improved when compared to the Y3Al5O12: Ce(3+) CPP with bulk phosphor, and hence, the luminous emittance, luminous flux, and conversion efficiency are improved.

Parental artistic drawings of the fetus before and after 3-/4-dimensional ultrasonography.

Objective: The purpose of this study was to assess the impact of 3-/4-dimensional ultrasonography (3D/4DUS) on parental impressions of their fetus using preexamination and postexamination parental drawings.

Methods: One hundred one parents (32 male and 69 female) were asked to draw pictures of their fetus immediately before and after undergoing 3D/4DUS. A drawing assessment instrument was used to evaluate the fetal anatomy by 4 reviewers.

Preexamination and postexamination assessment of parental-fetal bonding in patients undergoing 3-/4-dimensional obstetric ultrasonography.

Objective: The purpose of this study was to determine whether there is a change in parental bonding and couples' attitudes toward their fetus after undergoing 3-/4-dimensional ultrasonography (3D/4DUS).

Methods: Sixty-five fathers and 124 mothers were asked to fill out a maternal-fetal attachment questionnaire relating to how they felt about their fetus before and after 3D/4DUS and to mark on a line indicating their feelings about the ultrasonography experience. In addition, 135 parents filled out a positive feelings questionnaire consisting of 5 sections assessing their feelings about the fetus.

Isolated echogenic foci in the left upper quadrant of the fetal abdomen: are they significant?

Objectives: To evaluate fetuses with echogenic foci in the left upper quadrant of the abdomen by sonographic examination.

Methods: Between November 2000 and October 2001, we prospectively assessed fetuses with echogenic foci in the abdominal left upper quadrant on routine prenatal sonography. The location, number, and size of the foci were analyzed, and in utero and postpartum follow-up scans were performed.

Gender differences in the corpus callosum of neonates.

The gender difference of corpus callosum is a long standing controversy. Some investigators have reported that adult females have a more bulbous splenium and larger area relative to brain size, but others failed to replicate this. Few studies have reported on sexual dimorphism during development.