25, September 2025

Studies on doping concentration effect of CdS quantum dots in active layer of hybrid bulk heterojunction (P3HT:PCBM) polymer solar cells

Uncategorized, VOLUME-11; ISSUE-9; SEPT-2025

Author(s): S.V.Borse

Authors Affiliations:

Associate Professor, Dept. of  Physics, S.S.V.P.S’s ASC College, Shindkheda  (M.S.),India-425406

DOIs:10.2015/IJIRMF/202509026     |     Paper ID: IJIRMF202509026


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In this article, the process of making the hybrid bulk heterojunction (BHJ) polymer solar cells and their performance is discussed. The solar cells are made by mixing CdS nanoparticles (QDs) into a blend of a conjugated polymer called P3HT (poly(3-hexylthiophene)) and a fullerene-based material known as PCBM (phenylC61-butyric acid methyl ester), which is used as the acceptor. Dichlorobenzene and chlorobenzene are used as solvents. CdS nanoparticles in different amounts were added to a fixed amount of the P3HT and PCBM blend. The samples were tested using various methods like X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible (UV-VIS) spectroscopy, and I–V and power conversion efficiency (PCE) measurements. Adding CdS nanoparticles improves the structure of the active layer, making it more uniform, which leads to better light absorption and electrical conductivity. XRD results show that the way P3HT crystallizes is affected by how much CdS is mixed into the blend. When CdS QDs are mixed into the polymer blend, it increases the efficiency of the solar cells under normal light. The efficiency went from 1.3% to 4.0%, mainly due to higher fill factor (FF) and short-circuit current (Jsc) when the right amount of CdS nanoparticles was added. The increase in Jsc happened because the CdS nanoparticles formed a network inside the P3HT: PCBM blend. The presence of CdS nanoparticles also improved light absorption in the visible range because of their high absorption rate and long charge transport properties. The overall performance of the solar cells improved because of better Jsc, Voc, FF, and PCE, which is due to reduced charge recombination in the CdS-doped devices.Key words – Solar cell, Bulk heterojunction, CdS NPs, P3HT: PCBM.

CdS quantum dots, Polymer Solar cell, Hybrid bulk hetrojunction , P3HT:PCMB

S.V.Borse(2025); Studies on doping concentration effect of CdS quantum dots in active layer of hybrid bulk heterojunction (P3HT:PCBM) polymer solar cells, International Journal for Innovative Research in Multidisciplinary Field, ISSN(O): 2455-0620, Vol-11, Issue-9, Pp. 177-184.         Available on –   https://www.ijirmf.com/

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