I think you might find helpful the following paper:
Berthon, P., Ewing, M., & Hah, L. L. (2005). Captivating Company: Dimensions of Attractiveness in Employer Branding. International Journal of Advertising, 24(2), 151–172.
Although it doesn’t address directly organisational image, it identifies and prioritize components of employer attractiveness – some of them are closely related to the image of an organization and some concern development opportunities.
Hi! I can't think of any offhand, but I would definitely recommending searching about Impression Management Behaviour vs Organisational Citizenship Behaviour. Those are the concepts that you're definitely looking at!