Scientists from MIT have sensitized existing silicon सौर cells by singlet exciton fission method. This can increase efficiency of सौर cells from 18 percent to as high as 35 percent thus doubling energy output thereby reducing costs of solar technology.
जीवाश्म इंधनावरील आपले अवलंबित्व कमी करणे आणि शाश्वत भविष्यासाठी तंत्रज्ञान तयार करणे अत्यावश्यक होत आहे. सौर ऊर्जा चा अक्षय स्रोत आहे ऊर्जा जेथे सूर्याचे light is converted into electrical energy. सौर पेशी are most commonly made of silicon which uses photovoltaic process to transform सूर्यप्रकाश into electricity. Tandem cells are also being designed which generally include perovskites cells where every section of the सौर cells can harness सूर्याचे energy from its varied spectrum and thus have higher efficiency. Solar cells available today are limited by their efficiency which is just 15-22 percent.
3 जुलै रोजी प्रकाशित केलेला अभ्यास निसर्ग सिलिकॉन कसे हे दाखवून दिले आहे सौर cell efficiencies could be raised to as high as 35 percent by applying an effect called singlet exciton fission. In this effect a single particle of light (photon) can generate two electron-hole pairs as opposed to only one. Single exciton fission is seen in many materials since its discovery in the 1970s. The current study aimed to translate this effect for the first time into a viable सौर सेल
Researchers transferred single exciton fission effect from tetracene – a known material which exhibits it – into crystalline silicon. This material tetracene is a hydrocarbon सेंद्रीय semiconductor. The transfer was achieved by placing an additional thin layer of hafnium oxynitride (8 angstrom) between excitonic tetracene layer and silicon सौर cell and coupling them.
This tiny hafnium oxynitride layer acted as a bridge and made possible the generation of high energy photons in the tetracene layer which then triggered release of two electrons in the silicon cell as opposed to the usual one. This sensitization of silicon सौर cell reduced thermalization losses and enabled better sensitivity to light. The energy output of the सौर cells doubled as more output was generated from green and blue parts of the spectrum. This can enhance the efficiency of सौर cells to as high as 35 percent. The technology differs from the tandem solar cells as it just adds more current to the silicon without adding additional cells.
सध्याच्या अभ्यासाने सुधारित सिंगल-फिशन सिलिकॉन सोलर सेल्सचे प्रात्यक्षिक केले आहे जे वाढीव कार्यक्षमता दाखवू शकतात आणि अशा प्रकारे सौर तंत्रज्ञानाचा एकूण ऊर्जा निर्मिती खर्च कमी करू शकतात.
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{उद्धृत स्रोतांच्या सूचीमध्ये खाली दिलेल्या DOI लिंकवर क्लिक करून तुम्ही मूळ शोधनिबंध वाचू शकता}
स्त्रोत
आयनिंगर, एम. आणि इतर. 2019. टेट्रासीनमध्ये सिंगल एक्सिटॉन फिशनद्वारे सिलिकॉनचे संवेदीकरण. निसर्ग. ५७१. https://doi.org/10.1038/s41586-019-1339-4
