Rethinking Oregon Agriculture

Darla (Goodnoe) Baggenstos ’90 is no stranger to farming. She grew up raising cattle, pigs and chickens in Tigard. After graduating from Linfield, she married Jim Baggenstos, a third-generation farmer at Baggenstos Farm just down the road from her family’s farm

Miles K. Davis Named 20th President of Linfield College

When Miles K. Davis becomes Linfield\u27s 20th president, and the first African-American president for Linfield College in the institution\u27s 160-year history, he will bring an enthusiastic leadership style and an expansive worldview

Moving to the Future

Last fall, Linfield College purchased 20 acres in northeast Portland for a new nursing campus. When Linfield moves to its new facility in May 2020, it will mark a new chapter in nursing at Linfield, and the end of an era for the Linfield-Good Samaritan School of Nursing’s northwest Portland location, its home since 1982

Healthcare for Diverse Families

The first nursing textbook chapter devoted to care for LGBTQ families was written by two Linfield professors

A Life Transformed

It\u27s controlled chaos at the Portland Product Werks office. Only a few weeks before the launch of a new brand, shoe displays line the walls, samples spill from boxes stacked three high and people hunch over computers with phones to their ears. Even a small dog stands at attention, gingerly sniffing deliveries and visitors. In the middle of this whirlwind of activity is Sean Beers \u2798, a Bluetooth earpiece firmly affixed as he makes yet another call

Alumni Notes

News about Linfield alumn

Alumni Notes

Schedule of upcoming events, brief articles about alumni activities, and a column by the alumni directo

Sub-Cycle Strong-Field Interferometry

A nonlinear interferometry scheme is described theoretically to induce and resolve electron wave- function beating on time scales shorter than the optical cycle of the time-delayed pump and probe pulses. By employing two moderately intense few-cycle laser fields with a stable carrier-envelope phase, a large range of the entire electronic level structure of a quantum system can be retrieved. In contrast to single-photon excitation schemes, the retrieved electronic states include levels that are both dipole- and non-dipole-accessible from the ground electronic state. The results show that strong-field interferometry can reveal both high-resolution and broad-band spectral information at the same time with important consequences for quantum-beat spectroscopy on attosecond or even shorter time scales.Comment: first submitted on April 19, 201

Charge Transport Layers Limiting the Efficiency of Perovskite Solar Cells: How To Optimize Conductivity, Doping, and Thickness

Perovskite solar cells (PSCs) are one of the main research topics of the photovoltaic community; with efficiencies now reaching up to 24%, PSCs are on the way to catching up with classical inorganic solar cells. However, PSCs have not yet reached their full potential. In fact, their efficiency is still limited by nonradiative recombination, mainly via trap-states and by losses due to the poor transport properties of the commonly used transport layers (TLs). Indeed, state-of-the-art TLs (especially if organic) suffer from rather low mobilities, typically within 10-5 and 10-2 cm2 V-1 s-1, when compared to the high mobilities, 1-10 cm2 V-1 s-1, measured for perovskites. This work presents a comprehensive analysis of the effect of the mobility, thickness, and doping density of the transport layers based on combined experimental and modeling results of two sets of devices made of a solution-processed high-performing triple-cation (PCE ≈ 20%). The results are also cross-checked on vacuum-processed MAPbI3 devices. From this analysis, general guidelines on how to optimize a TL are introduced and especially a new and simple formula to easily calculate the amount of doping necessary to counterbalance the low mobility of the TLs