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New Path to More Efficient Organic Solar Cells Uncovered at Berkeley Lab’s Advanced Light Source

By Guest PostJanuary 12, 2013Environmentacceptor, advanced light source, affordable, als, als beamlines, amount, berkeley lab, brian collins, christopher mcneill, convert, crystallinity, donor, earth, efficient, electricity, eliot gann, energy use, exciton journey, fossil fuels, fullerene solar film, harald ade, john tumbleston, land mass, nanometers, north Carolina, organic cell, photovoltaic cells, photovoltaic devices, physicist, polymer, r soxs, research, resonant soft, silicon based, size matters, solar cell, solar energy, solvent diiodooctane, state university, stxm, sunlight, ultraviolet light beams, volume, x ray, x ray scattering, zhe li

Why are efficient and affordable solar cells so highly coveted? Volume. The amount of solar energy lighting up Earth’s land mass every year is nearly 3,000 times the total amount of annual human energy use. But to compete with energy from fossil fuels, photovoltaic devices must convert sunlight to electricity with a certain measure of efficiency. For polymer-based organic photovoltaic cells, which are far less expensive to manufacture than silicon-based solar cells, scientists have long believed that the key to high efficiencies rests in the purity of the polymer/organic cell’s two domains – acceptor and donor. Now, however, an alternate and possibly easier route forward has been shown.

Working at Berkeley Lab’s Advanced Light Source (ALS), a premier source of X-ray and ultraviolet light beams for research, an international team of scientists found that for highly efficient polymer/organic photovoltaic cells, size matters. (more…)

Medicare Policy: Barrier to Hospice Increases Hospitalization

By Guest PostOctober 31, 2012Healthadvanced dementia, affordable, aggressive treatment, analysis, antianxiety drugs, brown university, care act, death, hospice care, hospitalization, hypnotic, iv fluids, julie lima, medicare policy, medicare reimbursement, nursing home, physical therapy, skilled nursing, snf, susan miller, susan mitchell

Because of a Medicare policy that prevents simultaneous reimbursement for skilled nursing and hospice care, many families cannot choose hospice for loved ones who reside in nursing homes. The result, new research shows, is that residents with advanced dementia who have Medicare skilled nursing home care without any hospice care have a far greater likelihood of dying in the hospital and receiving aggressive treatments such as feeding tubes or physical therapy within weeks of death.

PROVIDENCE, R.I. [Brown University] — A Medicare rule that blocks thousands of nursing home residents from receiving simultaneous reimbursement for hospice and skilled nursing facility (SNF) care at the end of life may result in those residents receiving more aggressive treatment and hospitalization, according a new analysis.

“This study is the first, to the knowledge of the authors, to attempt to understand how treatments and outcomes vary for nursing home residents with advanced dementia who use Medicare SNF care near the end of life and who do or do not enroll in Medicare hospice,” wrote researchers, including lead author Susan Miller, research professor of health services policy and practice at Brown University, in the Journal of the American Geriatrics Society. (more…)

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New Path to More Efficient Organic Solar Cells Uncovered at Berkeley Lab’s Advanced Light Source

Medicare Policy: Barrier to Hospice Increases Hospitalization