ماں دی ممتا
پرانے زمانے دی گل اے کہ اک پنڈ دے لوک بہت ای ظالم سن۔ خاص طور تے اوہ پرندیاں دا شکار کردے۔ درختاں اتے چڑھ کے اوہناں دے آہلنیاںوچوں انڈے یاں بچے کڈھ لیندے سن۔ ایس پنڈ دے باہر اک بہت وڈا بوڑھ دا درخت سی۔ اوتھے اک طوطے نے آہلنا پایا۔ اک طوطا تے طوطی گلاں کردے نیں طوطا طوطی نوں آکھدا اے:
طوطیے من موتیے ایس نگری نہ جا
ایس نگری دے جٹ برے نیں پھائیاں لیندے پاء
اگوں طوطی جواب دیندی اے:
طوطیا من موتیا ٹاہلی میرے بچڑے لک ٹنوں ٹنوں
اوہناں دے دو چھوٹے بچے وی ہوندے نیں۔ طوطا آکھدا اے کہ میں پنڈ جاندا ہاں تاں جے بچیاں لئی کجھ کھاون لئی لے آواں۔ طوطی آکھدی اے۔
طوطیا من موتیا ٹاہلی میرے بچڑے لک ٹنوں ٹنوں
میں اپنے بچیاں نوں چھڈ کے نئیں جا سکدی جے میرے بچیاں نوں کجھ ہو گیا تاں میرا لک ٹٹ جاوے گا۔ میں مر جاواں گی۔ طوطا جان لگدا اے تے طوطی آکھدی اے۔ کہ توں ایس نگری نہ جا۔ ایس نگری دے لوک بہت برے نیں۔ اوہ تینوں قید کر لین گے تے جے تینوں کجھ ہو گیا تاں ساڈا کیہ بنے گا۔ طوطا ایہہ گل سن کے چپ کر کے بہہ جاندا اے۔ اوہ ٹاہلی تے بیٹھے ہوندے نیں تے جیہڑا وی مسافر ٹاہلی دے کولوں لنگھ دا اے۔ اوہ ایہو آکھدی اے۔
ٹاہلی میرے بچڑے لک ٹنوں ٹنوں
اک دن اک راہ گیر دھپ توں بچن لئی ٹاہلی تھلے بہہ جاندا اے۔ اوہدے کول روں ہوندا اے۔ طوطی روں ویکھ کے اوس نوں آکھدی اے۔
Islam lays much stress on the physical, spiritual and metal health of human beings. For the spiritual wellbeing of mankind Allah sent the Prophets and revealed divine books. The process of physical cure is called Tababat. Although it stands for the physical cure but is used as a spiritual cure as well. Five different methods of cure are found in the traditions of our Prophet (SAAW) and these have been discussed in this article. Whether a person should go for remedy of disease or not, both of these views are found in Ahadith, which is apparently a contradiction. In the following article an attempt has been made toreconcile these apparently different views. The views of Islamic Scholars have also been mentioned regarding this issue. Different methods of cure remained in use in different periods of time that have also been analyzed in this article. The prohibition and permission of the use of spiritual methods of cure such as Dumm, Ta’weez and magic have also been discussed and an attempt has also been made to find the reasons of two different existing extremes in Muslim nation regarding this matter.
Silicon is still the dominant photovoltaic technology with over 90% share in the solar cell market. Prices of silicon solar cells have drastically reduced in the past few years which has led to its widespread adoption, but manufacturing of these cells requires huge capital and running cost and the processes involved are extremely time and energy intensive.For solar cells to become ubiquitous their cost needs to be significantly lowered. This can be done through new approaches which involve cheap materials and easy processing. Perovskite and dye sensitized solar cells have emerged as cost effective alternatives to the silicon solar cells due to their simple and easy processing and inexpensive constituents. Although perovskite solar cells have demonstrated a lab scale power conversion efficiency of over 22% but their ambient air synthesis and long-term stability against moisture and water remains a challenge to their commercial exploitation. Different approaches including a water resistive top coating on perovskite cells, substituting iodide with chloride ion and methyl group with formamidinium cation, constructing two-dimensional layered morphologies and morphology engineering using co-solvents and additives have been explored to address these issues. Among these approaches, additive engineering due to its ease of incorporation, simplicity and unprecedented control over the nature and architecture of substituents offers huge advantage over all the rest.This thesis presents results of the ambient-air synthesis and stability studies of perovskite solar cells prepared using additives with hydrophobic and hydrophilic substituents. To realize perovskite solar cells two-step approach was employed. Ethanolamine (EA), dibutylamine (DBA) and dibutylethanol amine (DBEA) were used as complexing agents to modify the nucleation and crystallization behavior of lead iodide during film formation. All three additives significantly enhanced solubility of lead iodide in dimethylformamide (DMF). Perovskite films prepared using EA, DBA and DBEA showed much improved surface coverages, larger and uniform grain sizes and much enhanced uniformities compared to pristine film, which exhibited gross phase separation. Power conversion efficiencies (PCE) of over 3%, 5% and 10.8% were obtained for EA, DBA and DBEA incorporated perovskites whereas pristine devices exhibited PEC values of under 1%.Photoluminescence (PL) spectroscopy confirms IV results that charge recombination is drastically reduced by the addition of these additives and the lowest recombination was observed for DBEA. Similar trend was observed for air-stability tests where DBEAincorporated devices showed highest stability (over 750 h) followed by DBA (over 500 h) and then EA (less than 200 h). Under same environmental conditions, pristine devices were found to be completely degraded within 150 h. Second part of this thesis reports on the efficiency enhancement of dye sensitized solar cells by directly depositing gold (Au) nanoparticles on the mesoporous titania scaffold before dye xii sensitization. Cells based on these photoanodes showed 9.48% efficiency compared to 6.1% for the reference cell, exhibiting an overall enhancement of 55% using only 0.11 wt% of Au, which is the lowest reported Au concentration for DSSCs in the literature to-date. We also report on the use of biomass-derived nitrogen-doped carbon aerogel as an effective alternative to conventional platinum based counter electrodes for dye sensitized solar cells. The nitrogen-doped carbon aerogel electrode, deposited from oleylamine mixture, was annealed at different temperatures and its impact on photovoltaic performance of these cells is investigated. I-V measurements confirm that the annealing temperature substantially enhances photovoltaic parameters of these devices. The power conversion efficiency of the solar cells from optimized nitrogen-doped carbon aerogel exhibited comparable efficiency to that of a cell fabricated using platinum-based counter electrode.