Eng. &Tech.Journal, Vol.34,Part (B), No.1,2016   73   Enhancement of DSSC by Using Gold Nanoparticles Ghufran S. Jaber Applied Sciences Department, University of Technology/ Baghdad Email: Gufransattar184@yahoo.com, Dr. Abdulrahman K. Ali Applied Sciences Department, University of Technology/ Baghdad Dr. Mukhlis M. Ismail Applied Sciences Department, University of Technology/ Baghdad Received on: 10/3/2015 & Accepted on:12/11/2015 ABSTRACT In this research, AuNPs prepared by laser ablation in liquid (PLAL) at 750 mJ energy and 90 pulses. They have been added to N719-dye to form (Au-N719) mixture. TiO 2 paste was deposited on FTO substrates and immersion in a mixture dye and AuNPs. DSSC was fabricated and enhancement of the DSSC conversion efficiency was achieved. Scanning electron microscope, X- ray diffraction and UV-Visible spectrophotometer were used to characterize and study the DSSC components. The UV-Vis data show high absorbance of AuNPs+N719 dye compared to N719 dye only; that means the immersion of AuNPs in the N719-dye solution tend to increase the total absorbance of the dye. The XRD pattern of AuNPs has diffraction peaks at 38.2° and 44.4° which can be indexed by (111), (200) plane of Au in the cubic phase. The shape and size distribution shows spherical AuNPs with particle size about (50-60) nm. The relative increase of short circuit current density after the adding gold nanoparticles was about 76%. In the same way the relative increase of open circuit voltage after adding gold nanoparticles was about 6.7%. The total photon- to-current energy conversion efficiency for the standard DSSC is 1.75 while its 2.8 of the enhanced DSSC with gold NPs.The maximum enhancement is about 60 % under illumination (105 mW/cm 2 , (AM1.5). Keywords: PLAL, DSSC, AuNps, N719-dye انويه الن الذھبΕ جسيماϡستخدا با الصبغهيهϠ خ تحسين لخاص اΔ لبحث،΍΍ά ھ في)έيزϠل΍ ϡ΍ΪΨ باستھاήيπ تح تملتي΍ ھبάل΍ ΕاΌ جزيΔ إضافتϤ ت750 Εاπ نبΩΪ وعϝϮ جيϠ م90 (هπ نب يطϠ خϥϮϜ ليΔصبغϠ ل. منϥϮϜϤل΍ يطϠΨل΍ فيسϤغήيΪلقص΍ Ϊوكسي΍ ينέϮϠ فϩΪ قاعىϠ عسبήϤل΍ ϡϮلتيتاني΍ ϥϮΠ مع .ائتھاϔ ك وتحسينلصبغه΍ يهϠ خيعϨ تص تملكΫ Ϊ بع.يهϮانϨل΍ ھبάل΍ ΕاϤ وجسيلصبغه΍ تتθ تونيήتϜال΍ اسحϤل΍ ήھΠ م ئيήϤل΍ ومطيافيهϨلسي΍ اشعه΍ - خائص خصسه΍έΩ ويصΨθ لتϡΪΨست΍ يΠسϔϨلب΍ ϕϮ فιمتصا΍ ϥ΍ Ϊ وج.لصبغه΍ يهϠ Ϊ بعصبغهϠ ليهϠϜل΍ اصيهامتص΍ ϩΩياί لى΍ ϯΩ΍ اϤ مھاΪحϮ للصبغه΍ منىϠع΍ يهϮانϨل΍ ھبάل΍ ΕاϤ وجسيلصبغه΍ يطϠ خ ) وينϮ مست عنتϔθ كيهϮانϨل΍ ھبάل΍ ΕاϤسيΠ ليهϨلسي΍ اشعه΍ يصΨθ ت.يهϮانϨل΍ ھبάل΍ ΕاϤ جسيضافه΍ 200 و( ) 111 ) وھيΩϮلحي΍ يا΍و΍ لز( 38.2 و44.4 Π حΕ΍Ϋ ولϜθل΍ ويهή كيهϮانϨل΍ ھبάل΍ ΕاϤ جسييعίϮ ت.عبϜϤل΍ έϮ وبط( م ) بينΡ΍وή يت50 - 60 ήميتϮ نان( . كانتيهϮانϨل΍ ھبάل΍ ΕاϤ جسيضافه΍ Ϊ بعϩήلقصي΍ ϩήئ΍Ϊل΍ έ تيا فيسيبهϨل΍ ϩΩلزيا΍ 76 يهϮانϨل΍ ھبάل΍ ΕاϤ جسيضافه΍ Ϊ بعحهϮتϔϤل΍ ϩήئ΍Ϊل΍ لطيهϮ فيقهήلط΍ سϔϨ ب.% كانت6.7 لصبغه΍ يهϠΨ لϩاءϔϜل΍ .% جيهΫϮϤϨل΍ ھي1.57 هϨحسϤل΍ لصبغه΍ يهϠ خنϜ ل كانت2.8 ϩέΪ بقϩضاء΍ έΪصϤ كسϤθل΍ ءϮ ضϡ΍ΪΨ باست105 ρ΍ ويϠ م \ سم 2 ء΍Ϯ ھهϠ وكت1.5 έ΍ΪقϤ بϩاءϔϜϠ ب تحسين وحققت60 % .