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Photoelectric conversion; solar cells and arrays

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Analysis of emitter layer diverse effects on electrical performance for prospective si hybrid solar cell
Author(s): B.K. Ghosh, A.M. Khairul, A. Afishah, I. Saad, A.I.A. Rani, S.K. Ghosh
Source: 5th IET International Conference on Clean Energy and Technology (CEAT2018), 2018, p. 5 (4 pp.) - 5 (4 pp.)
Type: ConferencePaper
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This paper presents two aspects of emitter layer engineering (ELE) in Si solar cells. Firstly Si emitter layer thickness and doping density influence on electrical performance followed by emitter materials choice for hetero-junction (HJ) solar cell (SC) design have been addressed. Due to dynamic loss at the interface, the crystalline silicon solar cell performance limits significantly. Emitter layer diverse parameters choices are key consideration to reduce the loss in Si hetero-junction hybrid solar cell (Si HHSC). Desired parameters of advance emitter materials thermoelectric conduction could link to band gap, Eg for improvement of Si HHSC performance. To realize the rudiments of advance emitter materials crucial parameters in HHSC; firstly self-emitter (due to similar thermo-electric property) has been considered for 100 μm Si wafer. Computer based Si solar cell with emitter layer diverse thickness and doping profile have been analyzed. It is realized that minimum emitter thickness and doping are healthier to electrical efficiency enhancements.

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Electrical simulation of different photoactive layer thickness on organic heterojunction solar cell
Author(s): A.I.A. Rani, K.A. Mohamad, B.K. Ghosh, I. Saad, P. Ibrahim, A. Alias, A.B. Abd Rahman
Source: 5th IET International Conference on Clean Energy and Technology (CEAT2018), 2018, p. 6 (5 pp.) - 6 (5 pp.)
Type: ConferencePaper
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Organic bulk heterojunction solar cell based on poly 3hexylthiophene (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) blend as photoactive layer had been electrically simulated and analyzed at different thickness using general-purpose photovoltaic device model (GPVDM) software. Conjugate polymer P3HT acted as an electron donor, whereby PCBM acts as an electron acceptor in the device. The electrical simulation is performed at three different thicknesses of 50 nm, 100 nm, and 200 nm with P3HT/PCBM blend and hetero-layer configurations, respectively. The simulation analysis clearly demonstrated that both device configurations exhibited current-voltage (I-V) characteristics with highest short-circuit current density (Jsc) value of 2.26 mA/cm2 with P3HT/PCBM of blend configuration at 200 nm thickness. However, an open-circuit voltage (Voc) and fill factor (FF) showed a constant value, which 0.55 V and 0.72 a.u., respectively, for both device configurations. The obtained value of solar cell parameters was then analysed and compared with experimental data. This simulation work strongly reveals that different thickness of photoactive material affects the electrical performance even in different organic solar cell configurations.

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