An efficient and stable inverted perovskite solar cell involving inorganic charge transport layers without a high temperature procedure.

Despite the successful enhancement in the high-power conversion efficiency (PCE) of perovskite solar cells (PSCs), the poor stability of PSCs is one of the major issues preventing their commercialization. The attenuation of PSCs may be due to the lower heat resistance of the organic charge transport layer and the tendency to aggregate at high temperatures. Here we report cerium oxide (CeO ) as an electron transport layer (ETL) prepared through a simple solution processed at a low temperature (∼100 °C) to replace the organic charge transport layer on top of the inverted planar PSCs.

Temporal Trends of Common Female Malignances on Breast, Cervical, and Ovarian Cancer Mortality in Japan, Republic of Korea, and Singapore: Application of the Age-Period-Cohort Model.

Background: Reproductive system cancer is an important cause of morbidity and mortality worldwide which threatens women's health and lives. Breast, cervical, and ovarian cancer have the higher incidence and mortality among a series of gynecology malignant tumor. We aimed to compare and assess the temporal trends of common female malignances on breast, cervical, and ovarian cancer mortality in developed regions of Asia including Japan, Republic of Korea, and Singapore and analyze the detached effects of chronological age, time period, and birth cohort by age-period-cohort (APC) analysis.

[Studies on the correlation of 489 cases of bronchial asthma complicated with allergic rhinitis in Datong].

Objective: To discuss the disease incidence of bronchial asthma (BA) complicated with allergic rhinitis (AR) and the correlation of their age, classification, concomitant symptom.

Method: Four hundred-nine cases of AR were identified by means of random sampling, physical examination, laboratory test and questionnaire. According to the diagnostic criteria of BA, they were divided into two groups: group I ( control group) including 298 cases suffering from only AR, group II ( experimental group) 191 cases of BA concomittent with AR.