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Mothura Nath Borah , Sumbit Chaliha , Bhaskar J. Baruah , Suvangshu Dutta , G. Bortamuly , A. Rahman , Bedanta Bora

Abstract

To fabricate the (n)CdSe/(p)Si heterojunctions, Ag-doped CdSe thin films of doping concentration up to 7.23×10^{16cm-3 have been deposited onto p-type silicon wafer by sequential thermal evaporation technique. Different junction parameters such as diode ideality factor (n), built in potential (V_bi), reverse saturation current density (J₀), Richardson's constant (A*), short-circuit current (V_oc), etc. were determined from current-voltage (I-V) characteristics. The ideality factor was found greater than unity with high series resistance (R_s). These parameters show significant changes with variations of doping concentration and temperature. The I-V characteristics under illumination showed poor photovoltaic (PV) effect. However the structures showed the change of PV effect, giving a fill factor (FF) 0.43 for annealed sample with an open-circuit voltage (V_oc) 100 mV, a short-circuit current density (J_sc 13.2 μAcm-2 on increasing the doping concentration up to N_d = 7.23×1016cm-3. Large series resistance, high defect density and presence of interfacial layer are thought to be responsible for higher values of ideality factor and poor PV conversion efficiency. Proper doping and annealing are necessary to reduce the series resistance so as to achieve an ideal and high efficiency PV device.}

Keywords

Cadmium Selenide (cdSe), Thermal Evaporation Technique, Diode Ideality Factor,
Photovoltaic Effect

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Wangchuk Chungyalpa ¹, Bedanta Bora ², Samarjeet Borah ²

Affiliations
1 Department of Management Studies, Sikkim Manipal Institute of Technology(A constituent college of Sikkim Manipal University), Rangpo, Majitar, East Sikkim,, IN
2 Department of Management Studies, Sikkim Manipal Institute of Technology(A constituent college of Sikkim Manipal University), Rangpo, Majitar, East Sikkim, IN

Abstract

Defining business model constitutes a major challenge. This is primarily because there are many different aspects to a business, hence when we talk of business models, it means different things to different people. Difference lies in the very concept of what constitutes a business (key aspects) and how such a concept can be represented using a common notation. One solution to the problem is to use ontology to communicate. Ontologies are agreed upon frameworks for representing concepts in any domain area. Hence, ontologies are used to represent knowledge, processes, business motivations, business strategies, enterprise structure, and more including business models. The Business Model Ontology (BMO) is one such ontology. Designed and developed by Alexander Osterwalder, it is aimed specifically at representing, understanding, communicating and analyzing business models. This paper is an evaluation of the Business Model Ontology (BMO). The paper consists of two parts. In the first part the researchers describe the four pillars, the nine elements and their sub-elements comprising the ontology. In the second part the ontology is reviewed and evaluated using nine criteria. The fundamental aim is to examine the ontology capabilities – its strength and weaknesses.

Keywords

Ontology Definition, Business Model Ontology, BMO Evaluation, Ontologies, BMO Analysis.

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